MT As

WORD ROOT

DEFINITION

EXAMPLE

abdomin/o

abdomen

abdominal distention, abdominocentesis

acanth/o

thorny, spiny

acanthosis, acantholysis

acetabul/o

acetabulum (hip socket)

acetabuloplasty, acetabulectomy

acid/o

acid

acidophilic, acidosis

actin/o

ray, radius

Actinomyces, actinic keratosis

acou/o

hearing

acouesthesia, acoustic nerve

acr/o

extremities, height

acrocyanosis, acromegaly

adenoid/o

adenoids

adenoidectomy

aden/o

gland

adenoma, lymphadenitis

adrenal/o

adrenal gland

adrenalectomy, hyperadenocorticism

adren/o

adrenal gland

adrenogenital syndrome, adrenocorticotropin

aer/o

air, gas

aerobe, anaerobic, aeroembolism, aerosol

albumin/o

albumin

hypoalbuminemia, albuminuria

algesi/o

pain

algesiometer, algesiogenic

alveol/o

alveolus

alveolitis, alveolar proteinosis

ambly/o

dull, dim

amblychromasis, amblyopia

amni/o

amnion

diamniotic

amnion/o

amnion

diamnionic

amyl/o

starch

amyloidosis, amylase, amylose

an/o

anus

anorectal, anoperineal

andr/o

male

androgen, androblastoma

angi/o

vessel

angiography, lymphangiitis

anis/o

unequal, dissimilar

anisocoria, anisocytosis

ankyl/o

crooked, stiff, bent

ankylosing spondylitis, Ankylostoma

antr/o

antrum

antrectomy, antral

aort/o

aorta

aortography, aortitis

aponeur/o

aponeurosis

aponeurotomy

appendic/o

appendix

appendicitis

arche/o

first, beginning

archeocyte, archenteron

arteri/o

artery

arteriovenous fistula, arteriosclerosis

arteriol/o

arteriole (small artery)

arteriolosclerosis

arthr/o

joint

arthralgia, arthroscope, artropathy

articul/o

joint

articulation

atel/o

imperfect, incomplete

atelectasis

ather/o

yellowish, fatty plaque

atherosclerosis, atheroma

atri/o

atrium

atrioseptal defect, atrioventricular node

audi/o

hearing

audiology, audiovisual, auditorium

aur/i,o

ear

auricular cartilage, aura

aut/o

self

autoregulation, autoimmune

axill/o

armpit

axillary lymph node

az/o

urea, nitrogen

azotemia, azide,