/ Dictionary / Index E Erasistratus: Meaning and Definition of Find definitions for: Er•a•sis•tra•tus Pronunciation: (er"u-sis'tru-tus), [key] — n. c300–250 b.c., Greek physician and physiologist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. erasion Erasmian Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language