Comprehensive Study Guide to Medical Terminology and Etymology

Fundamentals of Medical Etymology and Word Structure

Medical terminology is rooted in the science of Etymology, which is defined as the study of the "Logos" or the word to uncover the true and original meaning of each term. This field avoids mere memorization and instead focuses on understanding the building blocks of language. According to Georgina Socorro Combe Arreche, understanding these roots is essential for medical practitioners. In the context of collegiate exams, a mastery level of $0\%$ is often attributed to those who simply memorize without understanding the etymological components.

Words are constructed through a systematic addition of elements to a core meaning. The structure of a medical term typically consists of a Root combined with Morphemes. Morphemes are subdivided into flexive and derivative types. Root elements designate the essential meaning, often referring to an organ or a specific entity. Derivative morphemes include prefixes and suffixes. Prefixes are added before the root to indicate locations, directions, or specific characteristics. Suffixes are added after the root to describe procedures, symptoms, pathological conditions (padecimientos), or diagnostic examinations. For example, specific suffixes relate to surgical interventions: "-tomía" refers to a cut, incision, or dissection; "-ectomía" signifies extirpation, excision, or resection; and "-ostomía" denotes the creation of a new opening through an "abertura" or "boca."

General Roots of Greek and Latin Origin

The following roots form the foundation of medical vocabulary, representing physical characteristics, colors, and clinical states:

• Andro: Man, male (hombre, varón).
• Bacteria: Rod or bacterium (barra, bacteria).
• Blasto: Embryonic or incipient development (embrionario, desarrollo incipiente).
• Bradi: Slow (lento).
• Braqui: Short (corto).
• Carcino: Cancer.
• Ciano: Blue (azul).
• Cirro: Orange-yellow or hard (amarillo anaranjado, duro).
• Cito: Cell (célula).
• Cloro: Green (verde).
• Coco: Berry or round grain (baya o grano redondo).
• Cubar: To sleep (dormir).
• Dactilo: Finger (dedo), as seen in "dactilar."
• Demo: Relating to people (relativo a la gente).
• Dolico: Long or elongated (largo, alargado).
• Edema: Increased volume (aumentado de volumen).
• Emesis: Vomiting (vómito).
• Eritro: Red (rojo).
• Esclero: Hardening (endurecimiento), as in "esclerosis."
• Escolio: Curved (curvo), as in "escoliosis."
• Espasmo: Contraction (contracción).
• Esteno: Narrow or strength (estrecho, fuerza).
• Estesia: Sensation (sensación).
• Foro: To carry or load (llevar, cargar).
• Fobia: Abnormal fear or aversion (miedo anormal, aversión).
• Gino/Gineco: Woman (mujer).
• Gluco: Sweet or sugar (dulce, azúcar).
• Hidro: Water or liquid (agua, líquido).
• Histo: Tissue (tejido).
• Iatro: Doctor or physician (médico, doctor).
• Ictero: Greenish-yellow (amarillo verdoso).
• Crio: Cold (frío), as in "crioterapia."
• Leuco: White (blanco).
• Lipo: Fat (grasa), as in "liposucción."
• Lito: Stone (piedra).
• Macro: Large (grande).
• Macula: Stain or spot (mancha).
• Mela/Melano: Black (negro).
• Meli/Melito: Honey (miel).
• Micro: Small (pequeño).
• Morfo: Structure (estructura).
• Necro: Dead (muerto).
• Odino: Pain or painful (dolor, doloroso).
• Onco: Mass or tumor (masa, tumor).
• Pato/Morbo: Disease or illness (enfermedad).
• Pedia: Child (niño).
• Percutir: To strike (golpear).
• Pio: Pus.
• Pireto: Fever (fiebre).
• Plasia: Cellular formation (formación celular).
• Podo: Foot (pie).
• Quiro: Hand (mano).
• Sacaro: Sugar (azúcar).
• Sarco: Flesh (carne).
• Sepsis: Infection (infección).
• Soma: Body (cuerpo).
• Tanato: Death (muerte).
• Taqui: Rapid (rápido).
• Termo: Temperature or heat (temperatura, calor).
• Toxo/Virus: Poison or venom (veneno).

Medical Suffixes and Their Meanings

Suffixes determine the nature of the condition or procedure being described:

• -algia: Pain (dolor).
• -cele: Hernia, tumor, or protrusion.
• -centesis: Puncture (punción).
• -clisis: Injection, such as "venoclisis."
• -desis: Fixation (fijación).
• -ectasia/-ectasis: Expansion or dilation (expansión, dilatación).
• -ectomía: Excision or extirpation (extracción).
• -espasmo: Involuntary contraction (contracción involuntaria).
• -genia/-génico/-genesia: Origin, production, or formation.
• -grafía: Description, figure, or image (imagen).
• -grama: Written record (registro escrito).
• -iasis: Condition or formation of.
• -itis: Inflammation (inflamación).
• -lisis: Dissolution or destruction.
• -logía: Study, treatise, or science (estudio).
• -malacia: Softening (reblandecimiento).
• -megalia: Growth or large (crecimiento).
• -metría/metro: Measurement or meter (medición).
• -oide: Resembling or similar to (semejante a).
• -oma: Tumor.
• -oscopia: Examination or inspection, such as "laparoscopia."
• -osis: Condition, increase, or disease, such as "osteoporosis."
• -ostomía: Opening, eyelet, or "mouth."
• -patía: Disease (enfermedad).
• -penia: Deficiency or decrease (disminución).
• -pexia: Suspension or fixation.
• -plastia: Plastic repair or surgical correction, such as "abdominoplastia."
• -podo: Foot.
• -ptosis: Fall or drooping (caída).
• -rrafia: Suture.
• -rragia: Flowing or hemorrhage (escurrimiento, derrame).
• -rrea: Flow (flujo).
• -rrexis: Rupture (rotura).
• -tomía: Cut or dissection, such as "histerectomía."
• -tricia: To break into pieces (hacer pedazos).

Greek Numeral Prefixes

The following prefixes are used to denote quantity or order in medical terminology:

• mono-: $\text{1}$
• di- / bis-: $\text{2}$
• tri- / tris-: $\text{3}$
• tetra-: $\text{4}$
• penta-: $\text{5}$
• hexa-: $\text{6}$
• hepta-: $\text{7}$
• octa-: $\text{8}$
• nona-: $\text{9}$
• deca-: $\text{10}$
• undeca-: $\text{11}$
• dodeca-: $\text{12}$
• trideca-: $\text{13}$
• tetradeca-: $\text{14}$
• pentadeca-: $\text{15}$
• hexadeca-: $\text{16}$
• heptadeca-: $\text{17}$
• octadeca-: $\text{18}$
• nonadeca-: $\text{19}$
• icosa-: $\text{20}$
• henicosa-: $\text{21}$
• doicosa-: $\text{22}$
• triicosa-: $\text{23}$
• tetraicosa-: $\text{24}$
• pentaicosa-: $\text{25}$
• hexaicosa-: $\text{26}$

Greek and Latin Descriptive Prefixes

These prefixes provide context regarding position, quality, and relation:

• a-, an- (Greek) / des- (Latin): Without (particle of negation).
• ambi-: On both sides.
• ana-: Upward.
• ante- / pre-: Before, in front of.
• anti- (Greek) / contra- (Latin): Against (contra).
• auto-: By oneself.
• cata-: Downward, below.
• cis-: On this side.
• dia- (Greek) / trans- (Latin): Through, apart, from one side to another.
• dis-: With difficulty, bad, or difficult.
• ec-, ecto- (Greek) / ab-, ex-, extra- (Latin): Outside, toward the outside.
• endo- (Greek) / intra- (Latin): Inside.
• epi- (Greek) / supra- (Latin): Above.
• eu-: Well, good, normal.
• hemi- (Greek) / semi- (Latin): Half.
• hetero-: Unequal, different.
• hiper- (Greek) / ultra- (Latin): More, excessive (sube).
• hipo- (Greek) / sub- (Latin): Low, below (situación inferior/baja).
• infra-: Below, lower situation.
• inter-: Between, in the middle.
• iso- / homo-: Equal.
• meta-: Beyond, change, transformation.
• oligo-: Scanty, little, deficient.
• orto-: Straight, right, normal, correct.
• pan-: All.
• para-, par- (Greek) / ad- (Latin): Near, toward the inside, together.
• peri- (Greek) / circum-, circun- (Latin): Around.
• poli- (Greek) / muti- (Latin): Multiple, many, several.
• pos-, post-: After, behind.
• pro-: In front of, before.
• retro-: Behind, backward.
• seudo-: False.
• sin-: Together, with, fused.

Categorized Anatomical Roots by System

Cardiovascular and Lymphatic Systems

Cardiovascular terms focus on vessels and the heart: "angio" (vessel), "arterio" (artery), "cardio" (heart), and "auscultar" (to listen). Venous health is described via "flebo" (Greek) or "veno" (Latin). Blood is represented by "hema," "hemato," or the suffix "-emia." Clots are referred to as "trombo." Related lymphatic structures include the spleen ("espleno") and lymph ("linfo").

Respiratory System

This system includes "bronco" (bronchus), "condro" (cartilage), and "esteto/torax" (chest). Functional roots include "fasia" (speak), "fono" (sound), "osmo" (smell), and "pnea" (breathing). Anatomical features include "gnato/maxila" (jaw), "laringo" (larynx), "neumo" (lung, air), "rino" (nose), "sinu" (hollow/cavity), and "traqueo" (trachea).

Digestive System

Roots covering the entire tract include "estoma/oro" (mouth), "queilo" (labio), "gingiva" (gum), "gloso" (tongue), "odonto/denti" (tooth), and "sialo/ptialo" (saliva). Throat and swallowing involve "faringo," "esofago," and "fago" (to eat). The stomach and intestines use "gastro," "entero," "colon," "ceco" (blind/cecum), "procto" (rectum/ano), and "copro" (excrement). Glands and fluid roots include "hepato" (liver), "pancreas," "cole" (bile), and "colecisto" (gallbladder). Abdominal terms include "celio" and "laparo." Conditions such as "disfagia" refer to pain when eating.

Musculoskeletal System

Skeletal terms include "osteo/os" (bone), "condro" (cartilage), "artro" (joint), "craneo" (skull), "costa" (rib), "espondilo" (vertebra), and "raqui" (spine). Muscular and tissue terms include "mio" (muscle), "leio" (smooth), "rabdo" (striated), and "meningo" (membrane).

Endocrine and Urinary Systems

Endocrine roots relate to internal secretion: "acro" (extremity), "adeno" (gland), "crino" (secrete), "hormono" (excite), "balo" (change), and "trofo" (nutrition). Urinary roots include "uro" (urine), "nefro/ren" (kidney), "uretero" (ureter), "uretro" (urethra), and "cisto/vesicula" (bladder).

Tegumentary and Genital Systems

Skin and covering terms include "derma/cutis" (skin), "onico" (nail), "trico" (hair), "tegumento" (covering), "blefaro" (eyelid), "masto/mama" (breast), and "telo" (nipple). Genital roots include "colpo" (vagina), "histero/metro" (uterus), "salpingo" (tube), "ooforo/ovario" (ovary), "meno" (menstruation), "amnio" (fetal sac), "toco" (birth), "orqui/testiculo" (testicle), "falo" (penis), "balano" (glans), "esperma/semen" (seed), and "cervix" (neck).

Word Analysis Exercise

An analysis of specific medical terms demonstrates the synthesis of prefixes, roots, and suffixes to define clinical conditions:

• Pericarditis: Composed of "peri-" (around), "-cardio" (heart), and "-itis" (inflammation). Meaning: inflammation around the heart.
• Piretólisis: Composed of "-pireto" (fever) and "-lisis" (dissolution). Meaning: dissolution of fever.
• Hidrógeno: Composed of "-hidro" (water) and "-geno" (origin). Meaning: the origin of water.
• Estenosis: Composed of "-esteno" (narrowing) and "-osis" (condition/formation). Meaning: condition of narrowing.
• Antiséptico: Composed of "anti-" (against), "-sepsis" (infection), and "-ico" (pertaining to). Meaning: contrary to infection.
• Anestesia: Composed of "an-" (without) and "-estesia" (sensation). Meaning: without sensation.
• Hysteropathy (Enfermedad de la matriz): Root "-histero" (uterus) and suffix "-patia" (disease).
• Syndactyly (Dedos juntos o fusionados): Prefix "sin-" (together) and root "dactilo" (finger).
• Scoliosis (Condición de curvo): Root "escolio" (curved) and suffix "-osis" (condition/formation).
• Pyogeny (Que origina pus): Root "pio" (pus) and suffix "-genia/-geno" (origin).
• Chiromegaly (Manos anormalmente grandes): Root "quiro" (hand) and suffix "-megalia" (enormous/large).
• Bradycardia (Corazón lento): Root "cardio" (heart) and root "bradi" (slow).

Bibliographical References

• Cárdenas, E. \text{5^{a}} ed. Terminología médica. México: McGrawHill, $2014$.
• Real Academia Nacional de Medicina de España. Diccionario de términos médicos. Available at: https://dtme.ranm.es/index.aspx
• Steiner, S. Capps, N. \text{3^{a}} ed. Curso rápido de terminología médica. México: Limusa, $2018$.
• Vélez, F. \text{1^{a}} ed. Terminología aplicada a las ciencias de la salud. España: Elsevier, $2015$.