/ Dictionary / Index L lysimeter: Meaning and Definition of Find definitions for: ly•sim•e•ter Pronunciation: (lī-sim'i-tur), [key] — n. an instrument for determining the amount of water-soluble matter in soil. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lysimachus lysin Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language