/ Dictionary / Index A Agassiz: Meaning and Definition of Find definitions for: Ag•as•siz Pronunciation: (ag'u-sē for 2 also Fr. a&wdspcga&wdspcsē'), [key] — n. 1835–1910, U.S. oceanographer and marine zoologist, born in Switzerland. his father,1807–73, U.S. zoologist and geologist, born in Switzerland. a lake existing in the prehistoric Pleistocene Epoch in central N America. 700 mi. (1127 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: agassiz (Thesaurus) agarose Agastrophus Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language