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[sur-kyuh-luh s] /ˈsɜr kyə ləs/
noun, plural circuli
[-lahy] /-ˌlaɪ/ (Show IPA)
any of the concentric circles on each scale of a fish, each of which indicates the annual growth of that scale.
Origin of circulus
< Latin: circle Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for circulus
  • These were calculated by the number of circuli present plus growth since the formation of the last circulus.
  • Statistical interrelation of length, growth, and scale circulus spacing: appraisal of a growth rate estimator for fish.
circulus in Medicine

circulus cir·cu·lus (sûr'kyə-ləs)
n. pl. cir·cu·li (-lī')

  1. A ringlike or circular structure.

  2. A circle formed by connecting arteries, veins, or nerves.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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