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Root Words

Medical Terminology Root Words

TermDefinition
abdomin/o abdomen
aden/o gland
adenoid/o adenoids
adren/o adrenal glands
alveol/o alveolus (air sac within the lung)
amni/o amnion (sac surrounding embryo)
angi/o vessel (blood)
append/o, appendic/o appendix
arteri/o artery
arteriol/o small artery
arthr/o joint
ather/o fatty plaque
axill/o armpit
balan/o penis
bari/o weight
bi/o life
blephar/o eyelid
bronch/o bronchial tube
bronchiol/o small bronchial tubes
calcane/o calcaneus (heel bone)
capillar/o capillary
carcin/o cancer, cancerous
cardi/o heart
carp/o wrist bones (carpal)
cephal/o head
cerebell/o cerebellum (posterior part of the brain)
cerebr/o cerebrum (largest part of the brain)
cervic/o neck
chem/o drug, chemical
cholecyst/o gallbladder
choledoch/o common bile duct
chondr/o cartilage
chron/o time
cis/o to cut
clavicul/o clavicle (collarbone)
coccyg/o tailbone
col/o colon (large intestine)
colon/o colon (large intestine)
colp/o vagina
comi/o to care for
coni/o dust
coron/o heart
cost/o rib
crani/o skull
crin/o secrete
cry/o cold
cutane/o skin
cyan/o blue
cyst/o urinary bladder
cyt/o cell
dactly/o fingers or toes
dent/i tooth
dermat/o, derm/o skin
duoden/o duodenum
dur/o dura mater (outermost meningeal layer)
electr/o electricity
encephal/o brain
endocrin/o endocrine glands
endometr/o, endometri/o endometrium (inner lining of the uterus)
enter/o intestines (small intestines)
epiglott/o epiglottis
epitheli/o skin (surface tissue)
erythr/o red
esophag/o esophagus
esthesi/o sensation
femor/o femur, thigh bone
fibr/o fibrous tissue
fibul/o fibula (smaller lower leg bone)
gastr/o stomach
gen/o to produce
ger/o old age
glyc/o sugar
gnos/o knowledge
gynec/o woman, female
hemat/o, hem/o blood
hepat/o liver
humer/o humerus (upper arm bone)
hydr/o water
hypophys/o pituitary gland
hyster/o uterus
iatr/o treatment
ile/o ileum (third part of small intestine)
ili/o ilium (upper part of hip bone)
inguin/o groin
isch/o to hold back
jejun/o jejunum
lapar/o abdomen
laryng/o larynx (voice box)
later/o side
ligament/o ligament
leiomy/o smooth muscle
leuk/o white
lip/o fat
lith/o stone
lumb/o loin, waist region
lymph/o lymph
lymphaden/o lymph nodes
lymphangi/o lymph vessel
lys/o breakdown, destruction, separation
mamm/o breast
mast/o breast
mediastin/o mediastinum
medull/o medulla oblongata (lower part of the brain)
men/o menstruation
mening/o meninges (membranes covering brain and spinal cord)
metacarp/o metacarpals (hand bones)
metatars/o metatarsals (foot bones)
metr/o, metri/o uterus; to measure
muscul/o muscle
my/o muscle
myel/o bone marrow (with -blast, -cyte, -genous, -oma)
myel/o spinal cord (with -cele, -gram, -itis)
myos/o muscle
myring/o eardrum
nas/o nose
nat/i birth
necr/o dead
nephr/o kidney
neur/o nerve
norm/o rule, order
nos/o disease
obstetr/o midwife
ocul/o eye
odont/o tooth
onc/o tumor
onycho/o nail
o/o egg
oophor/o ovary
ophthalm/o eye
opt/o, optic/o eye
or/o mouth
orch/o testicle, testis
orchi/o testicle, testis
orchid/o testicle, testis
orth/o striaght
osm/o smell
oste/o bone
ot/o ear
ovari/o ovary
pancreat/o pancreas
parathyroid/o parathyroid gland
path/o disease
ped/o child
pelv/o hip bone
peritone/o peritoneum (membrane around abdominal organs)
perone/o fibula
phak/o lens of the eye
phalang/o phalanges (finger and toe bones)
pharyng/o pharynx, throat
phleb/o vein
phren/o diaphragm
phren/o mind
pituitar/o pituitary gland
plas/o developmental, formation, growth
pleur/o pleura (membrane around the lungs)
pneum/o air, lung
pneumon/o lung
poster/o behind
prosth/o artificial replacement
proct/o anus and rectum
prostat/o prostate gland
psych/o mind
pulmon/o lung
pyel/o renal pelvis (central section of the kidney)
radi/o x-ray; radius (lateral lower arm bone)
rect/o rectum
ren/o kidney
retin/o retina of the eye
rhabdomy/o striated (skeletal) muscle
rheumat/o flow, fluid
rhin/o nose
sacr/o sacrum
salping/o fallopian tube; eustachian tube
sarc/o flesh
scapul/o shoulder blade (bone)
scrot/o scrotal sac, scrotom
sept/o infection
septic/o infection
son/o sound
spin/o backbone, spine, vertebrae
splen/o spleen
spondyl/o backbone, vertebrae
stern/o sternum (breastbone)
stomat/o mouth
tendin/o, ten/o tendon
theli/o, thel/o nipple
thorac/o chest
thromb/o clot
thym/o thymus gland
thyr/o, thyroid/o, thyroaden/o thyroid gland
tibi/o tibia or shin bone (lower leg bone)
tonsill/o tonsils
top/o to put, place
trache/o trachea, windpipe
troph/o development, nourishment
tympan/o eardrum
uln/o ulna (medial lower arm bone)
ungu/o nail
ureter/o ureter
urethr/o urethra
ur/o urine, urinary tract
uter/o uterus
vagin/o vagina
vas/o vas deferens, vessel
vascul/o blood vessel
ven/o vein
venul/o venule
vertebr/o backbone, vertebra
vesic/o urinary bladder
Created by: amcdoulett