/ Dictionary / Index R ruby-crowned kinglet: Meaning and Definition of Find definitions for: ru'by-crowned king'let Pronunciation: (r'bē-kround"), [key] an olive-gray, American kinglet, Regulus calendula, the male of which has an erectile, ruby crest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ruby ruby glass Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language