arcus

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Related to arcus corneae: corneal arcus, arcus juvenilis

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.

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.
References in periodicals archive ?
Ankle brachial index, a drop in blood pressure in the legs that predicts severe atherosclerosis, was determined in the 2001-2003 examination of the Copenhagen City Heart Study in 2,773 participants, who had also participated in the baseline examination and had complete information on all relevant variables, including xanthelasmata and arcus corneae.
In contrast, the results show that arcus corneae is not a significant independent risk predictor for heart attack or heart disease.
For this analysis, the researchers included 12,745 people for whom complete information on all relevant variables, including xanthelasmata and arcus corneae, were available at baseline.