Breadcrumb Home > Dictionary > Index H hydrothermal vent: Meaning and Definition of Find definitions for: hy'drother'mal vent' Pronunciation: [key] — Oceanog., Geol. Oceanog.,Geol. an opening on the floor of the sea from which hot, mineral-rich solutions issue. Cf. vent (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrothermal hydrothorax 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: vernacular Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language