/ Dictionary / Index T testudinal: Meaning and Definition of Find definitions for: tes•tu•di•nal Pronunciation: (te-std'n-l, -styd'-), [key] — adj. pertaining to or resembling a tortoise or tortoise shell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. test-tube skin testudinate Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language