Term Definition a- no, not, without, away from ab- away from abdomin- abdomen ablat/o to remove, to destroy abrad/o to scrape, to wear away -ac pertaining to acanth/o thorny, sharp spine acar/o mites acid/o acid, sour, bitter acou- hear acr/o extremities, top act- drive, do, act actin/o radiation, ray acu- needle -ad toward, in the direction of ad- toward, increase aden/o gland adenoid/o adenoids adip/o fat adren/o adrenal glands aer- air agglutin/o clumping agit/o rapidity, restlessness -agogue simulator, agent causing change -agra severe pain -al relating to albin/o white, deficient pigmentation -algesia pain -algia pain aliment/o nutrition allo- other alve- channel, cavity alveol/o alveolus ambi- both, both sides, around ambly/o dull, dim ambul/o walking amni/o amnion, sac around embryo amphi- both sides ampho- both sides, double amyl- starch -an pertaining to an- not, without, away from an/o anus, ring ana- up, apart, again andr/o male andro- male angi/o blood or lymph vessel anis- unequal ankyl/o bent, stiff anomal/o irregular ante- forward, before anter/o front anthrac/o carbon, coal anthrop/o human life anti- against antr/o antrum, cavity aort/o aorta -apheresis separation, removal aphth/o ulcer apic/o apex apo- separate, away from append/o appendix aque/o water -ar pertaining to arch- beginning, origin, first arteri/o artery arteriol/o small artery arthr/o joint articul/o joint -ary pertaining to -ase enzyme aspir/o inhaling asthen- weakness astr/o star atelo- incomplete, imperfect ather/o plaque, soft fatty deposit atmo steam, vapor -atresia closure, occlusion atreto- closed atri/o atrium audi/o hearing aur/o ear auto- self, same aux/o growth axi/o axis axill/o armpit azot/o nitrogen
