/ Dictionary / Index P peta-: Meaning and Definition of Find definitions for: peta- Pronunciation: [key] a combining form used in the names of units of measure equal to one quadrillion (10) of a given base unit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pet Petach Tikva 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