/ Dictionary / Index C circulatory system: Meaning and Definition of Find definitions for: cir'culatory sys"tem Pronunciation: [key] — Anat., Zool. Anat.,Zool. the system of organs and tissues, including the heart, blood, blood vessels, lymph, lymphatic vessels, and lymph glands, involved in circulating blood and lymph through the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. circulator circulus Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language