Breadcrumb Home > Dictionary > Index A armillary sphere: Meaning and Definition of Find definitions for: ar'millary sphere' Pronunciation: [key] — Astron. Astron. an ancient instrument consisting of an arrangement of rings, all of which are circles of the same sphere, used to show the relative positions of the celestial equator, ecliptic, and other circles on the celestial sphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. armillary arming chest TrendingHere are the facts and trivia that people are buzzing about. Did Birds Evolve from Dinosaurs? The Twelve Dancing Princesses Current Events This Week: January 2023 African Americans by the Numbers Andersen's Fairy Tales: Contents The Celtic Twilight: A Teller of Tales ✖ Related Content Daily Word Quiz: hubris Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language