/ Dictionary / Index H hydrosome: Meaning and Definition of Find definitions for: hy•dro•some Pronunciation: (hī'dru-sōm"), [key] — n. Zool. the entire body of a compound hydrozoan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrosoma hydrosphere Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language