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Combining Forms
| Question | Answer |
|---|---|
| aer/o | air, gas |
| ather/o | plaque, fatty substance (inside blood vessel) |
| blast/o | immature cells |
| calc/o, calci/o | calcium |
| chondri/o, chondr/o | cartilage, grainy, gritty |
| chyl/o | chyle, a digestive juice |
| chym/o | chyme, semifluid production of chyme in the stomach |
| cyst/o, cysti | bladder, cyst, cystic duct |
| cyt/o | cell |
| ethm/o | ethmoid bone |
| gli/o | glue, neuroglia |
| gluc/o | glucose |
| glyc/o | sugars |
| hydr/o | hydrogen, water |
| ket/o, keton/o | ketone, acetone |
| lip/o | fat (outside of blood cell) |
| nucle/o | nucleus |
| plasma, plasmo | formative, plasma |
| salping/o | tube |
| sider/o | iron |
| somat/o | body |
| squam/o | scale, squamous (meaning scaly) |
| syring/o | tube |
| algesi/o, algi/o, alg/o | pain |
| cry/o | cold |
| dips/o | thirst |
| esthesi/o | sensation, perception |
| kin/o, kine | movement, motion |
| kinesi/o, kines/o | motion |
| phon/o | sound, voice, speech |
| phot/o | light |
| son/o | sound |
| therm/o | heat |
| acanth/o | spiny, thorny |
| andr/o | masculine |
| chlor/o | chlorine, green |
| chrom/o, chromat/o | color |
| crypt/o | hidden, obscure |
| cyan/o | blue |
| eosin/o, erythr/o | (rosey) red, redness |
| granul/o | granular |
| gyn/o, gyne, gynec/o | women |
| home/o, hom/o | same, constant |
| ichthy/o | dry, scaly, fishy |
| idi/o | distinct, unknown |
| immun/o | safe, immune |
| leuk/o | white |
| macr/o | large |
| meg/a, megal/o | large, million |
| melan/o | black, dark |
| micr/o | small, tiny |
| mio | smaller, less |
| morph/o | structure, shape |
| norm/o | normal |
| physi/o | physical, natural |
| pseud/o | false |
| scler/o | hardness, hardening |
| scoli/o, ankyl/o, (kyph/o) | curved, crooked, bent (hump) |
| spher/o | round, spherical |
| staphyl/o | grape-like clusters |
| sten/o | narrowness |
| strept/o | twisted chains, streptococci |
| terat/o | monster (as a malformed fetus) |
| xanth/o | yellow |
| bacill/o | bacilli, bacteria |
| bacteri/o | bacteria |
| carcin/o | cancer |
| kyph/o | humpback |
| onch/o, onc/o | tumor |
| path/o | disease |
| pyr/o | fever, fire, heat |
| schist/o, schiz/o | split, division |
| anter/o, anteri/o, ventr/o | near or toward the front side, ventral |
| dextr/o | right, toward the right |
| dors/o, poster/o | near or toward the back side, behind, dorsal |
| goni/o | angle |
| later/o | lateral, to one side |
| medi/o | middle, medial plane |
| mes/o | middle, median |
| orth/o | straight, normal |
| top/o | place, topical |
| crin/o | secrete |
| gen/o | producing, being born |
| hypn/o | sleep |
| log/o | speech, words, thoughts |
| narc/o | sleep, numbness |
| phag/o | eating, devouring, swallowing |
| somn/o, somni | sleep |
| spir/o | breath, breathe |
| actin/o | light |
| amyl/o | starch |
| bar/o | weight, pressure |
| bas/o, basi/o | base |
| bio | life |
| chem/o | chemical |
| chrono | time |
| coni/o | dust |
| cycl/o | circle, cycle, ciliary body (sensory system) |
| dyn/o, dynam/o | force, energy |
| echo | reflected sound |
| electr/o | electricity |
| eti/o | cause |
| fibr/o | fiber |
| fluor/o | light, luminous, fluorine |
| fungi | fungus |
| galact/o, lact/o, lacti | milk |
| ger/o, geront/o | old age |
| lith/o | stone |
| lys/o | dissolution, destruction |
| necr/o | death, dying |
| noct/i, nyct/o | night |
| pharmaco | drugs, medicine |
| phyt/o | plant |
| py/o | pus |
| radio | radiation, X-ray, radius |
| stere/o | 3-dimensional |
| tel/o, tele/o | distant, end, complete |
| ton/o | tension, pressure |
| toxi, toxic/o, tox/o | poison, toxin |
| troph/o | food, nutrition |
| super/o | above |
| infer/o | below |
| proxim/o | near or at point of attachment |
| dist/o | far or away from point of attachment |
| adip/o, lip/o, steat/o | fatty |
| cutan/o, derm/o, dermat/o | skin |
| hidr/o | sweat |
| ichthy/o | fishy, scaly |
| kerat/o | horny tissue, cornea (sensory system) |
| melan/o | black, very dark |
| myc/o | fungus |
| onych/o | nail |
| pil/o, trich/o | hair |
| seb/o | sebum, sebaceous gland |
| xanth/o | yellow |
| xer/o | dry |
| cephal/o | head |
| cerebell/o | cerebellum |
| cerebr/o, cerebr/i | cerebrum |
| crani/o | cranium, skull |
| encephal/o | brain |
| gangli/o | ganglion |
| mening/o, meningi/o | meninges |
| myel/o | bone marrow, spinal cord |
| neur/o, neur/i | nerve |
| spin/o, rachi/o | spine |
| thalam/o | thalamus |
| vag/o | vagus nerve |
| ventricul/o | ventricle |
| audi/o, audit/o aur/o, auricul/o | hearing |
| blephar/o | eyelid |
| cerumin/o | wax |
| cochle/o | cochlea |
| conjunctiv/o | conjunctiva |
| cor/o, core/o, pupill/o | pupil |
| corne/o, kerat/o | cornea |
| glauc/o | gray or silver |
| ir/o, irid/o | iris |
| lacrim/o | tears |
| mastoid/o | mastoid process |
| myring/o, tympan/o | eardrum, middle ear |
| nas/o | nose |
| ocul/o, ophthalm/o, opt/o, optic/o | eye |
| ossicul/o | ossicule |
| phac/o, phak/o | lens |
| presby/o | old |
| retin/o | retina |
| scler/o | white of the eye |
| scot/o | darkness |
| uve/o | uvea |
| aden/o | gland |
| adren/o, adrenal/o | adrenal glands |
| gluc/o | glucose (sugars) |
| glyc/o | glycogen |
| gonad/o | gonads (sex glands) |
| pancreat/o | pancreas |
| parathyroid/o | parathyroid |
| thyr/o, thyroid/o | thyroid gland |
| arthr/o | joint |
| brachi/o | arm |
| burs/o | bursa |
| calcane/o | heel |
| carp/o | wrist |
| cervic/o | neck |
| chondr/o | cartilage |
| condyl/o | knob, knuckle |
| cost/o | rib |
| dactyl/o | fingers, toes |
| fasci/o | fascia |
| femor/o | femur |
| humer/o | humerus |
| ili/o | ilium |
| ischi/o | ischim |
| lamin/o | lamina |
| leiomy/o | smooth muscle |
| lumb/o | lumbar |
| maxill/o | upper jaw |
| metacarp/o | metacarpal |
| my/o | muscle |
| oste/o | bone |
| patell/o | knee |
| ped/i, ped/o, pod/o | foot |
| pelv/o | pelvis |
| phalang/o | finger/toe bone |
| pub/o | pubes |
| radi/o | forearm bone |
| rhabd/o | rod-shaped |
| rhabdomy/o | striated muscle |
| scapul/o | scapula |
| spondyl/o | vertebra |
| agglutin/o | clumping |
| hem/o, hemat/o | blood |