/ Dictionary / Index A aquarist: Meaning and Definition of Find definitions for: a•quar•ist Pronunciation: (u-kwâr'ist), [key] — n. a curator, collector, or ichthyologist associated with an aquarium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aquarids aquarium Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language