a-	no; not; without
an-	no; not; without
ab-	away from
abdomin/o	abdomen
-ac	pertaining to
acanth/o	spiny; thorny
acar/o	mites
acetabul/o	acetabulum (hip socket)
acous/o	hearing
acoust/o	hearing, sound
acr/o	extremeties; top; extreme point
acromi/o	acromion (extension of shoulder bone)
actin/o	light
acu/o	 sharp; severe; sudden
-acusis	hearing
ad-	toward
-ad	toward
aden/o	gland
adenoid/o	adenoids
adip/o	fat
adren/o	adrenal gland
adrenal/o	adrenal gland
aer/o	air
af-	toward
agglutin/o	clumping; sticking together
-agogue	producer, leader
-agon	to assemble; gather
agora-	marketplace
-agra	excessive pain
-al	pertaining to
alb/o	white
albin/o	white
albumin/o	albumin (protein)
alges/o	sensitivity to pain
-algesia	sensitivity to pain
-algia	pain
all/o	other
alveol/o	alveolus; air sac; small sac
ambi-	around, on both sides, about
ambly/o	dim; dul
amphi-	around, on both sides
-amine	nitrogen compound
ammon/o	ammonium
amni/o	amnion (ssac surrounding the embryo)
amyl/o	startch
an/o	anus
-an	pertaining to
ana-	up; apart; backward; again; anew
andr/o	male
aneurysm/o	aneurysm (widening of blood vessel)
angi/o	vessel (blood)
anis/o	unequal
ankyl/o	stiff
ante-	before; forward
anter/o	front
anthrac/o	coal
anthr/o	antrum of the stomach
anti-	against
anxi/o	uneasy; anxious
aort/o	aorta (largest artery)
-apheresis	removal
aphth/o	ulcer
apo-	off; away
aponeur/o	aponeurosis (type of tendon)
append/o	appendix
appendic/o	appendix
aque/o	water
-ar	pertaining to
arachn/o	spider
-arche	beginning
arsenic/o	arsenic
arter/o	artery
arteri/o	artery
arteriol/o	arteriole (small artery)
arthr/o	joint
-arthria	articulate (speak distinctly)
articul/o	joint
-artresia	closure, occlusion
atreto-	closed, lacking an opening
-ary	pertaining to
asbest/o	asbestos
-ase	enzyme
aspir/o	removal
-assay	to examine, analyze
-asthenia	lack of strength
astr/o	star, star-shaped
aque/o	water
atel/o	incomplete
ather/o	plaque (fatty substance)
-ation	process; condition
atri/o	atrium (upper heart chamber)
atmo-	steam, vapor
audi/o	hearing
audit/o	hearing
aur/o	ear
auricul/o	ear
auscult/o	to listen
aut/o	self; own
aut-	self; own
auto-	self; own
aux/o	growth, acceleration
axill/o	armpit
axi/o	axis
azot/o	urea; nitrogen