| Term | Definition |
| a,an | without
ex: anencephalic-w/o a brain |
| ab | away
ex: abduction-away from,rotate |
| ad | towards
ex:adduction-toward,rotate |
| algia | pain
ex:neuralgia-nerve pain |
| ante | before,wall part
ex:antipartum-before birth |
| anti | against
ex:antibacterial-against bacterial |
| bi | two,double
ex:bilateral-two sides |
| brady | slow
ex:bradycardia-slow heartbeat |
| circum | around
ex:circumrenal- around the kidney |
| co,con | together
ex:concentric-together center,same center |
| de | down, away from
ex:dehydrate-away from hydration |
| desis | binding, fixation of
ex:arthrodesis-surgical fixation of a joint |
| dia | through
ex:diaplacental-through the placenta |
| dys | difficult, abnormal
ex:dysemia-abnormal blood |
| ecto | outside
ex:ectocornea-outer layer of the cornea |
| ectomy | excision
ex:tonsilectomy-tonsil removal |
| endo | within
ex:endogastric-within the stomach |
| epi | outer,on top of , over
ex: epigastric- on top of stomach |
| exo | away from
ex:exophthalmus-eyes bulging away from |
| extra | outside,beyond
ex:extrasensory -beyond senses |
