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Root Words
Common root words and combining forms for medical terminology.
| Term | Definition |
|---|---|
| abdomin/o | abdomen |
| acou/o | hear |
| aden/o | gland |
| adip/o | fat |
| alb/o | white |
| alges/o | pain |
| andr/o | man, male |
| angi/o | vessel |
| angin/o | blood vessels |
| ankyl/o | fused, stiff |
| anter/o | front |
| aort/o | aorta |
| apprendo/o | appendix |
| arteri/o | artery |
| arthr/o | joint |
| asthen/o | weak |
| atel/o | incomplere |
| ather/o | fat |
| atri/o | atrium |
| audi/o | to hear |
| aur/o | ear |
| aut/o | self |
| bacteri/o | bacteria |
| bi | life; two |
| chron/o | time |
| cirrh/o | yellow-orange |
| cleid/o | clavicle |
| col/o | colon |
| colp/o | vagina |
| condyl/o | knuckle of joint |
| cor/o | pupil |
| corne/o | cornea |
| cost/o | rib |
| crani/o | cranium/skull |
| crin/o | to secrete |
| cubitus | elbow |
| cutane/o | skin |
| cyan/o | blue |
| cycl/o | circle or cycle |
| cyst/o | bladder |
| cyt/o | cell |
| derm(at)/o | skin |
| digit | finger or toe |
| dipl/o | two, double |
| dips/o | thirst |
| disl/o | flat shape, intervertebral disk |
| dist/o | distant, away |
| diverticul/o | diverticulum, a small blind pouch |
| dors/o | back |
| duct/o | lead, move |
| duoden/o | duodenum |
| ech/o | to bounce, sound |
| ede | swelling |
| elast/o | change shape |
| electr/o | electricity |
| embol/o | a plug |
| embry/o | embryo |
| emesis | vomit |
| emmetr/o | according to measure |
| encephal/o | brain |
| enrer/o | small intestine |
| episi/o | vulva |
| erythr/o | red |
| esthesi | sensation or perception |
| Febr | fever |
| flex | bend |
| foranem | opening |
| fract | break |
| gastr.o | stomach |
| gest | carry, produce, congestion |
| glyc/o | sugar, sweet |
| gno | know |
| gyn/o | woman, female |
| hem(at)/o | blood |
| hepat/o | liver |
| heter/o | other, different |
| hom/o | same |
| hydr/o | water |
| idi/o | person, self |
| lact/o | milk |
| leuk/o | white |
| lingu/o | tongue |
| mal/o | bad, abnormal |
| medi/o | middle |
| melan/o | black, dark |
| men/o | month, menstration |
| mening/o | usually refers to the meninges |
| myel/o | marrow or spinal cord |
| my/o | muscle |
| nephr/o | kidney |
| neur/o | nerve |
| ocul/o | eye |
| opthalm/o | eye |
| oste/o | bone |
| ot.o | ear |
| ov/o | egg |
| palpate | to examine by touch |
| path/o | disease |
| ped/o | child or foot |
| percuss | to examine by striling |
| phag/o | to eat |
| pharyng/o | throat |
| phot/o | light |
| pleur/o | rib, side |
| pneum(at)/o | lungs, air |
| pod(i) | foot |
| pseud/o | false |
| psych/o | mind |
| pto | fall |
| ptyal/o | saliva |
| pulmon/o | lungs |
| pur,py | pus |
| pyr/o | fire, heat |
| quad/o; quar | four |
| ren/o | kidney |
| rhin/o | nose |
| sangui(n)/o | blood |
| scler/o | hard |
| sebum | fatty secretion of the sebaceous glands |
| sect/o | cut |
| sept/o | wall, divider; seven |
| serum | clear portion of blood |
| sinus | cavity, channel, or hollow space |
| som(at) | mouth |
| spir/o | coil, to breathe |
| stern/o | sternum |
| stomat/o | mouth |
| thorac/o | chest |
| tom/o | cut |
| tosic/p | poisonous |
| trich/o | hair |
| ur/o | urine |
| uter/o | uterus/womb |
| varic/o | dilated vein |
| vas/o | blood vessel |
| viscer/o | internal organs |
| xen/o | foreign(material) |
| xer/o | dry |