/ Dictionary / Index P pseudobulb: Meaning and Definition of Find definitions for: pseu•do•bulb Pronunciation: (s'du-bulb"), [key] — n. Bot. an enlarged, aboveground portion of stem, present in many tropical orchids, in which moisture is stored. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pseudobulb (Thesaurus) pseudoaquatic pseudocarp Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language