/ Dictionary / Index E Elinvar: Meaning and Definition of Find definitions for: El•in•var Pronunciation: (el'in-vär"), [key] — Trademark. Trademark. an alloy of iron, nickel, chromium, and other constituents, resistant to rust and magnetization and having a low rate of thermal expansion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: elinvar (Thesaurus) elint Eliot Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language