/ Dictionary / Index P plerocercoid: Meaning and Definition of Find definitions for: ple•ro•cer•coid Pronunciation: (plēr"ō-sûr'koid), [key] — n. Zool. the wormlike larval stage of some tapeworms, intermediate between the first parasitic larval stage and adult. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pleoptics plesiosaur Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language