/ Dictionary / Index L lacustrine: Meaning and Definition of Find definitions for: la•cus•trine Pronunciation: (lu-kus'trin), [key] — adj. of or pertaining to a lake. living or growing in lakes, as various organisms. formed at the bottom or along the shore of lakes, as geological strata. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lacustrine (Thesaurus) Lacus Solis LACW Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language