/ Dictionary / Index H H chain: Meaning and Definition of Find definitions for: H chain Pronunciation: [key] — Immunol. Immunol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hCG H.C.M. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language