/ Dictionary / Index T thylacine: Meaning and Definition of Find definitions for: thy•la•cine Pronunciation: (thī'lu-sīn", -sin), [key] — n. a wolflike marsupial, Thylacinus cynocephalus, of Tasmania, tan-colored with black stripes across the back: probably extinct. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thylacine (Thesaurus) Thyestes thylakoid Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language