• synonyms


  1. a star, the fifth-magnitude companion of Mizar in the handle of the Big Dipper.
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Origin of Alcor

perhaps < Arabic al-khawr the low ground
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for alcor

Historical Examples of alcor

  • Alcor (al´-kôr), g Ursæ Majoris, "the cavalier" or "the rider."

    A Field Book of the Stars

    William Tyler Olcott

  • Its distance is a little over half that between Mizar and Alcor.

    Astronomy with an Opera-glass

    Garrett Putman Serviss

  • They saw and named Alcor, thousands of years before telescopes were invented, and long before there were any books to help them.

  • Just above it is a very small star that astronomers call Alcor, or the rider.

  • The naked eye perceives near it a smaller star, named Alcor.