/ Dictionary / Index E extensile: Meaning and Definition of Find definitions for: ex•ten•sile Pronunciation: (ik-sten'sul, -sīl), [key] — adj. Chiefly Zool., Anat. capable of being extended; adapted for stretching out; extensible; protrusible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: extensile (Thesaurus) extensible extensimeter Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language