/ Dictionary / Index P pinnatisect: Meaning and Definition of Find definitions for: pin•nat•i•sect Pronunciation: (pi-nat'u-sekt"), [key] — adj. Bot. (of a leaf&hasp;) divided in a pinnate manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pinnatisect (Thesaurus) pinnatiped pinner Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language