PREFIX MEANING ab- away from acou- hear act- do, act ad-, aff- to aden- gland aer- air, gas alg- pain alve- tough ambi- both sides amphi- about, around, both sides ana- up, apart, across andr- man angi- blood vessel, duct ante- before anti- against, counter apo- from arachn- spider arch- beginning, origin arthr- joint articul- joint audi- hearing aur- ear ax-, axon- axis bar- weight bi- two, double blast- bud brachi- arm brady- slow capit- head cata- down caud- tail cell- cell, room centr- center cephal- head cerv- neck chord- string, cord chro- color chron- time circum- around contra- against, counter corpus- body crani- skull cry- cold cut- skin de- away from dendr- tree dent- tooth derm- skin di- twice, double dia- through, apart dis- apart from dors- back dys- bad, improper

PREFIX MEANING angio- vessel audio- hearing anti- against brady- slow cyto- cell ect- outside ecto- outer, outside electr- amber encephal- brain end- inside endo- within epi- upon, after, on eso- inward esthe- feel, perceive eu- good, normal exo- outside extra- outside of, beyond fibr- fibrous, fibers glom- little ball gloss- tongue graph- write, scratch hemi- half hyper- above, beyond, extreme hypno- sleep hypo- below, under inflamm- setting on fire infra- beneath inter- among, between intra- inside intro- into lingu- tongue macro- large medi- middle mega- large meningo- membrane mes- middle meta- beyond micro- small multi- many ophthalm- eye para- beside, beyond peri- around phag- eat phon- sound phot- light poly- many post- after, behind pre- before, in front of proprio- self, one's own quadri- four resti- rope retro- backwards semi- half somat- body spondyl - vertebra sub- under, below supra- above syringo- pipe, tube tachy- fast tel- end trans- through, across, over