arcus

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Related to arcus cornealis: arcus senilis, xanthelasma, arcus adiposus

arcus

[′ar·kəs]
(meteorology)
A dense and horizontal roll-shaped accessory cloud, with more or less tattered edges, situated on the lower front part of the main cloud.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

arcus

A low, horizontal cloud formation associated with the leading edge of thunderstorm outflow (i.e., gust front). Roll clouds and shelf clouds are both types of arcus clouds.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Arcus cornealis was present in 36%, and 80% had tendon xanthomata.
Arcus cornealis is present in about 25% of FH subjects by the age of 40 years and about 45% by the age of 50 years; by the age of 75 years more than 75% of the cohort was affected, possibly due to senescence (arcus senilis).
Body mass index, PCVD prevalence, the presence of tendinous xanthomas and arcus cornealis, total and serum LDL-cholesterol concentrations, and the frequencies of the 118 mutations were significantly higher in patients with a definite clinical diagnosis of FH.