/ Dictionary / Index P pearl danio: Meaning and Definition of Find definitions for: pearl' da'nio Pronunciation: [key] a slender iridescent tropical cyprinid, Brachydanio albolineatus, from parts of southeast Asia: a popular freshwater aquarium fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pearl cotton pearl diver Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language