/ Dictionary / Index H helleri: Meaning and Definition of Find definitions for: hel•ler•i Pronunciation: (hel'u-rī", -rē), [key] — n. a brightly colored, playful topminnow that is a hybrid of Xiphophorus helleri and X. maculatus, bred for aquariums. swordtail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: helleri (Thesaurus) heller Helles Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language