Breadcrumb Home > Dictionary > Index D double helix: Meaning and Definition of Find definitions for: dou'ble he'lix Pronunciation: [key] — Biochem.,Genetics. Biochem.,Genetics. the spiral arrangement of the two complementary strands of DNA. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double-helical gear double hitch TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: inchoate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language