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Medical Terminology


Word PartDefinition
mono-, uni- one
bi-, di- two
tri- three
quad-, quadri-, tetra- four
centi- one hundred or one-hundreth
milli- one-thousandth (1/1000)
diplo- double
hemi-, semi- half, partly
hyper- excessive, more than normal
hypo- beneath or below normal
multi-, poly- many
nulli- none
pan- all
primi- first
super-, ultra- excessive
ab- away from
ad- toward
ante-, pre- before in time or in place
circum-, peri- around
dia- through
ecto-, ex-, exo-, extra- out, without, away from
en-, end-, endo- inside
epi- above, on
hypo-, infra-, sub- beneath, under
inter- bewtween
intra- within
ipsi- same
meso-, mid-, medio- middle
para- near, beside, or abnormal
per- through or by
post- after, behind
retro- behind, backward
super-, supra- above, beyond
sym-, syn- joined together
trans- across
a-, an- no, not, without
in- not or inside
macro-, mega-, megalo- large or great (related to size)
micro- small (related to size)
ante-, pre-, pro- before (related to time)
post- after or behind (related to time)
anti-, contra- against (related to description)
brady- slow (related to description)
dys- bad, difficult (related to description)
eu- good, normal (related to description)
mal- bad (related to description)
pro- favoring, supporting (related to description)
tachy- fast (related to description)
anter(o) front
poster(o) back
ventr(o) ventral, belly side
dors(o) back
medi(o) medial, median, middle or nearer the middle
later(o) lateral, farther from the midline of the body or from a structure
super(o) superior, uppermost or above
infer(o) inferior, lowermost or below
proxim(o) proximal, nearer the origin or point of attachment
dist(o), tel(e) far or distant
caud(o) tail
cephal(o) cephalad, toward the head
abdomin(o) abdomen
acr(o) extremities (arms and legs)
cephal(o) head
crani(o) cranium (skull)
dactyl(o) finger or toe
encephal(o) brain
herni(o) hernia
omphal(o), umbilic(o) umbilicus (naval)
pelv(i) pelvis
periton(o) peritoneum
pod(o) foot
som(a), somat(o) body
spin(o) spine
thorac(o) thorax (chest)
viscer(o) viscera (large abdominal organs)
hem(a), hem(o), hemat(o), -emia blood
hidr(o) sweat, perspiration
hydr(o) water
muc(o) mucus
py(o) pus
sial(o) saliva; salivary glands
ur(o)(used to describe cells) urine; urinary tract
cellul(o) little cell or compartment (used to describe cells)
chrom(o) color (used to describe cells)
cyt(o), -cyte cell
hemoglobin(o) hemoglobin (used to describe cells)
kary(o), nucle(o) nucleus
morph(o) shape; form
necr(o) death
norm(o) normal
phil(o) attraction
poikil(o) irregular
spher(o) round
calc(i) calcium
kal(i) potassium
natr(o) sodium
coagul(o) coagulation
fibrin(o) fibrin
thromb(o) thrombus; clot
aer(o) air or gas
angi(o), vascul(o) vessel
home(o) sameness; constant
is(o) equal
lith(o) stone; calculus
necr(o) death
-ant that which causes
-ate to cause an action or the result of an action
-cidal killing
-poiesis production
-poietin that which causes production
iatr(o) physician or treatment
idi(o) individual
immu(o) immunity
nos(o), path(o) disease
seps(o) infection
sept(i), sept(o)* infection; *also means septum
bacter(i), bacteri(o) bacteria
staphyl(o) grapelike cluster, uvula
strept(o) twisted
fung(i), myc(o) fungus
vir(o), virus(o) virus
aut(o) self
-phylaxis protection
vascul(o) vessel
aort(o) aorta
arter(o), arteri(o) artery
arteriol(o) arteriole
cardi(o) heart
phleb(o), ven(i), ven(o) vein
venul(o) venule
endocardi(o) endocardium
myocardi(o) myocardium
pericardi(o) percardium
atri(o) atrium
coron(o) crown
mediastin(o) mediastinum
ox(i) oxygen
pulmon(o) lung
sept(o)* *septum; partition
sin(o) sinus
steth(o), thorac(o) chest
valv(o), valvul(o) valve
ventricul(o) ventricle
-ole small
rhythm(o), rrhythm(o) rhythm
de- down, from, or reversing
-stenosis narrowing; stricture
aneurysm(o) aneurysm
ather(o) yellowish, fatty plaque
embol(o) embolus
aden(o) gland
adenoid(o) adenoids
lymph(o) lymph, lymphatics
lymphaden(o) lymph node
lymphangi(o) lymph vessel
lymphat(o) lymphatics
splen(o) spleen
thym(o) thymus
tonsill(o) tonsil
febrile fever
palm palm
plantar sole (foot)
prone face laying down
supine lying on back
Created by: bmg4