• synonyms


[sur-kyuh-luh s]
noun, plural cir·cu·li [-lahy] /-ˌlaɪ/.
  1. any of the concentric circles on each scale of a fish, each of which indicates the annual growth of that scale.
Show More

Origin of circulus

< Latin: circle
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for circulus

Historical Examples

  • Otherwise the definition is called a circulus in definiendo.

    The Art of Logical Thinking

    William Walker Atkinson

  • Otherwise the definition is called a circulus in definiendo (defining in a circle).


    William Walker Atkinson

  • He purposely makes us tread the round of the circulus vitiosus, as in the old saw: A Cretan said, all Cretans are liars.

  • Decima vero o dicitur teca, circulus, vel cyfra vel figura nichili.

    The Hindu-Arabic Numerals

    David Eugene Smith

  • The entire activity of justice is a circulus vitiosus, a faulty short conclusion.

circulus in Medicine


n. pl. cir•cu•li (-lī′)
  1. A ringlike or circular structure.
  2. A circle formed by connecting arteries, veins, or nerves.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.