/ Dictionary / Index C cachectin: Meaning and Definition of Find definitions for: ca•chec•tin Pronunciation: (ku-kek'tin), [key] — n. a protein that is released by activated macrophages as an immune system defense and, when the defense is overwhelmed, is a cause of cachexia or toxic shock: in humans, identical with tumor necrosis factor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cache cachepot Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language