/ Dictionary / Index H hemocyanin: Meaning and Definition of Find definitions for: he•mo•cy•a•nin Pronunciation: (hē"mu-sī'u-nin, hem"u-), [key] — n. Biochem. a blue, copper-containing respiratory pigment in the plasma of many invertebrates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hemoconcentration hemocyte Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language