Breadcrumb Home > Dictionary > Index L lectin: Meaning and Definition of Find definitions for: lec•tin Pronunciation: (lek'tin), [key] — n. Biochem. any of a group of proteins that bind to particular carbohydrates in the manner of an antibody and are commonly extracted from plants for use as an agglutinin, as in clumping red blood cells for blood typing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lectin (Thesaurus) lectern lection ✖ Related Content Daily Word Quiz: centrifugal Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language