Definitions

from The Century Dictionary.

  • noun A prefix in some words of French origin, ultimately from re- and ad-. See rabate, rabbet, rapport, etc.
  • noun A chemical symbol of radium. Rd is more generally used.
  • noun A terminal moraine.
  • noun An obsolete form of roe.
  • noun In Egypt, mythol., the sovereign sun-god of the Memphite system, the chief Egyptian personification of the Supreme Being.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an intensely radioactive metallic element that occurs in minute amounts in uranium ores
  • noun ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods
  • noun (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere

Etymologies

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Examples

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  • Ra. Chemical element symbol for Radium.

    December 2, 2007

  • A coastal terminal moraine in Scandinavia.

    December 8, 2007