circulus

[ sur-kyuh-luh s ]
/ ˈsɜr kyə ləs /

noun, plural cir·cu·li [-lahy] /-ˌlaɪ/.

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for circuli

circulus

[ sûrkyə-ləs ]

n. pl. cir•cu•li (-lī′)

A ringlike or circular structure.
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.