Vocab O - R

ob-

against, toward, in front of (obturator)

oc-

against (malocclusion)

occipit-

back of the head (occipital lobe)

oculo-

eye (oculomotor)

odonto-

tooth (odontoid_

-oid

like, in the shape of (sigmoid)

-ole

little (arteriole)

oligo-

few, little deficient (oliguria)

-ologist

one who studies, specializes (cardiologist)

-ology

study of (biology)

-oma

tumor (carcinoma)

omni-

all (omnivore)

omo-

shoulder (omodynia)

onco-

cancer (oncogene)

oo-, ov-

egg (oocyte)

op-

vision (optics)

opthalm-

eye (opthalmology)

-opia

eye (myopia)

-opsy

viewing of (autopsy)

or-

mouth (oral cavity)

orbi-

circle (orbicularis oris)

orchid-

testis (orchiditis)

ortho-

straight, normal, correct (orthodontics)

-ory

pertaining to (sensory)

-oscopy

viewing (laparoscopy)

-ose

full of (adipose)

-osis

condition of (osteoporosis)

osmo-

push (osmosis)

osse-, osteo-

bone (osteoblast)

-ostomy

formation of an opening (tracheostomy)

oto-

ear (otogenic)

-otomy

cut (lobotomy)

papilli-

nipple (renal papilla)

para-

near, beside (paranasal)

par-

birth, labor (postpartum)

-paresis

partial loss of voluntary muscle strength (hemiparesis)

pariet-

wall (parietal membrane)

-pathy

disease (pathology)

pecto-

chest (pectoralis major)

ped-

children (pediatrics)

pelv-

basin (renal pelvis)

-penia

deficiency (leukopenia)

penna-

feather (bipennate)

per-

through (permeable)

peri-

around (periosteum)

phag-

eat (phagocytosis)

-phasia

speech (dysphasia)

phleb/o-, ven-

vein (phlebotomist)

phil-, -phil

have an affinity for (lipophilic)

-phobe

abnormal fear, dread (hydrophobia)

phot-

light (photoreceptor)

-phragm

partition (diapragm)

-phylaxis

guard (prophylaxis)

-physis

growth (diaphysis)

physio-

nature, function of (physiology)

pilo-

hair (piloerector muscle)

pino-

drink (pinocytosis)

-plasia

growth, formation (hyperplasia)

-plasty

surgical repair (rhinoplasty)

plant/o-, sole-

sole of foot (plantar wart)

platy-

flat, side (platysma)

plegia-

paralyze (paraplegia)

plex-

twisted, woven (nerve plexus)

-pnea

breathing (apnea)

pod-

foot (podocyte)

-poie, -poiesis

make, formation of, produce (erythropoietin)

poll-

thumb (pollex)

poly-

many (polycythemia)

poplit-

behind the knee (popliteal artery)

post-

after (postnatal)p

presby-

old (presbyopia)

prim-

first (primitive)

pre-, pro-

before in time, place (prenatal, prosect)

procto-

anus, rectum (procectomy)

profund-

deep, far from the body surface (flexor digitorum profundus)

proprio-

self, one’s own (proprioception)

pseudo-

false (pseudostratified)

psych-

mind (psychology)

ptero-

wing (pterygoid)

-ptosis

drooping or downward displacement of a structure (gastroptosis)

pulmo-

lung (pulmonary arteries)

pyel-

pelvis (pyelitis)

pylor-

gatekeeper (pyloric stenosis)

pyo-

pus (pyogenic)

pyro-

heat, fever (pyrogen)

quad-

fourfold (quadriceps)

radic-

the root of a structure (radiculopathy)

rami-

branch (ramus)

re-

back (rehabilitation)

rect-

straight (rectus abdominis)

reno-

kidney (renal)

rete-, reti-

network (retina)

retro-

backward, behind (retroperitoneal)

rhabdo-

striated skeletal muscle (rhabdomyolysis)

rhino-

nose (rhinoplasy)

rigo-

stiffness (rigor mortis)

-rrhage

excessive, abnormal flow (hemorrhage)

-rrhea

discharge or flow (diarrhea)

rub(r)o-

red (bilirubin)

rugo-

fold, wrinkle (rugae)