circulus


Also found in: Medical, Wikipedia.

circulus

[′sər·kyə·ləs]
(biology)
Any of various ringlike structures, such as the vascular circle of Willis or the concentric ridges on fish scales.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The most detailed description of circulus arteriosus cerebri was published by Kanan, but this work don't showed photographs and topography by sections of these vessels in relation to the different parts of the head and encephalon.
This is why a more precise expression in this context would indeed be an antivicious circle: a non-cycle of existence, i.e., a circulus antivitiosus.
The previously mentioned interaction has the potential for positive feedback and circulus vitiosus creation.
This musculoskeletal situation has an essential importance as it also contributes to the further reduction of physical activity and participation in exercise, resulting in kinesiophobia which contributes to "circulus vitiosus" of reduced energy output and increased adiposity [41].
Each scale was measured along a reference line drawn along the longest axis of the posterior portion of the scale from the center of the focus to the leading edge of the 9th circulus (Sa), 21st circulus (Sb), 1st annulus (Sc), 2nd annulus (S2), 3rd annulus (S3), and to the edge of the scale (S4).
Circulus present between abdominal segments III and IV, with an intersegmental crease.