/ Dictionary / Index P planometer: Meaning and Definition of Find definitions for: pla•nom•e•ter Pronunciation: (plu-nom'i-tur), [key] — n. Mach. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. planography planospore Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language