crow's foot

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See also: crow's feet and crow's-foot


The crow's-foot notation indicates that an author can write several books, and a book can be written by several authors.


crow's foot (plural crow's feet)

  1. (usually in the plural) A small wrinkle in the corner of an eye, emblematic of aging.
    • So longe mote ye live, and alle proude,/Til crowes feet be growe under your eye
    • 1814 July, [Jane Austen], chapter XV, in Mansfield Park: A Novel. In Three Volumes, volume I, London: Printed for T[homas] Egerton, Military Library, Whitehall, OCLC 39810224, pages 305–306:
      You must get a brown gown, and a white apron, and a mob cap, and we must make you a few wrinkles, and a little of the crowsfoot at the corner of your eyes, and you will be a very proper, little old woman.
    • 2013 September 11, Kim Painter, “New wrinkle: Botox approved to treat crow's feet”, in USA Today[2]:
      The Food and Drug Administration says it's an effective temporary treatment for crow's feet, the wrinkles that form next to aging eyes.
  2. (sewing) A triangular embroidery stitch.
  3. (databases) A symbol, resembling a bisected equilateral triangle, used in database diagrams to indicate plurality.
    • 1999, Robert J Muller, Database Design for Smarties
      The crow's-foot notation similarly represents relationships.
    • 2007, Geoff Coffey, Susan Prosser, Filemaker Pro 9: The Missing Manual‎
      Each crow's foot in your ER diagram indicates the need for a foreign key.
  4. A caltrop.