/ Dictionary / Index C cryoplankton: Meaning and Definition of Find definitions for: cry•o•plank•ton Pronunciation: (krī"ō-plangk'tun), [key] — n. plankton that live in the icy waters and meltwaters of glacial or polar areas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cryophyte cryoprobe Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language