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Medical Word Parts - Letter: a

Term	Definition
a-	no, not, without, away from
ab-	away from
abdomin-	abdomen
ablat/o	to remove, to destroy
abrad/o	to scrape, to wear away
-ac	pertaining to
acanth/o	thorny, sharp spine
acar/o	mites
acid/o	acid, sour, bitter
acou-	hear
acr/o	extremities, top
act-	drive, do, act
actin/o	radiation, ray
acu-	needle
-ad	toward, in the direction of
ad-	toward, increase
aden/o	gland
adenoid/o	adenoids
adip/o	fat
adren/o	adrenal glands
aer-	air
agglutin/o	clumping
agit/o	rapidity, restlessness
-agogue	simulator, agent causing change
-agra	severe pain
-al	relating to
albin/o	white, deficient pigmentation
-algesia	pain
-algia	pain
aliment/o	nutrition
allo-	other
alve-	channel, cavity
alveol/o	alveolus
ambi-	both, both sides, around
ambly/o	dull, dim
ambul/o	walking
amni/o	amnion, sac around embryo
amphi-	both sides
ampho-	both sides, double
amyl-	starch
-an	pertaining to
an-	not, without, away from
an/o	anus, ring
ana-	up, apart, again
andr/o	male
andro-	male
angi/o	blood or lymph vessel
anis-	unequal
ankyl/o	bent, stiff
anomal/o	irregular
ante-	forward, before
anter/o	front
anthrac/o	carbon, coal
anthrop/o	human life
anti-	against
antr/o	antrum, cavity
aort/o	aorta
-apheresis	separation, removal
aphth/o	ulcer
apic/o	apex
apo-	separate, away from
append/o	appendix
aque/o	water
-ar	pertaining to
arch-	beginning, origin, first
arteri/o	artery
arteriol/o	small artery
arthr/o	joint
articul/o	joint
-ary	pertaining to
-ase	enzyme
aspir/o	inhaling
asthen-	weakness
astr/o	star
atelo-	incomplete, imperfect
ather/o	plaque, soft fatty deposit
atmo	steam, vapor
-atresia	closure, occlusion
atreto-	closed
atri/o	atrium
audi/o	hearing
aur/o	ear
auto-	self, same
aux/o	growth
axi/o	axis
axill/o	armpit
azot/o	nitrogen