the imaginary spherical shell formed by the sky, usually represented as an infinite sphere, the center of which is a given observer’s position.
an imaginary sphere of infinitely large radius enclosing the universe so that all celestial bodies appear to be projected onto its surface
An imaginary sphere with Earth at its center. The stars, planets, Sun, Moon, and other celestial bodies appear to be located on this sphere, and the sphere appears to rotate around the Earth’s extended axis once every 24 hours, carrying the celestial bodies with it overhead and giving them their diurnal motions. The celestial sphere is essentially a spherical map of the sky that provides the basis for the coordinate systems used in celestial navigation and in specifying the positions and motions of celestial objects. See more at altazimuth coordinate system, ecliptic coordinate system, equatorial coordinate system.
a transparent celluloid sheet on which a character, scene, etc., is drawn or painted and which constitutes one frame in the filming of an animated cartoon: may be overlapped for change of background or foreground. Historical Examples noun short for celluloid (sense 2b), celluloid (sense 2c) n. “celluloid sheet for an animated cartoon,” from celluloid; […]
cincture (defs 1, 2).
cincture (defs 1, 2). Historical Examples
Saint, died a.d. 432, Italian ecclesiastic: pope 422–432. (Guido di Castello) flourished 12th century, Italian ecclesiastic: pope 1143–44. (Giacinto Bobone) died 1198, Italian ecclesiastic: pope 1191–98. (Godfrey Castiglione) died 1241, Italian ecclesiastic: pope 1241. Saint (Pietro di Murrone or Morone) 1215–96, Italian ascetic: pope 1294. a white to pale-blue mineral, strontium sulfate, SrSO 4 , […]