a halo phenomenon in which a vertical streak of light appears above and below the sun, believed to be caused by the reflection of sunlight by ice crystals with vertical axes.
noun 1. a windowed porch or porchlike room having more window than wall area, intended to receive large amounts of sunlight. 2. an open pen, raised above the ground, for giving poultry light and air under sanitary conditions.
noun 1. a town in S Wisconsin.
adjective 1. impervious to sunlight or damage by the rays of the sun.
noun 1. SPF. sun protection factor n. Abbr. SPF The ratio of the minimal ultraviolet dose required to produce erythema with and without a sunscreen; a measure of the degree to which a sunscreen protects the skin from ultraviolet radiation, the higher the number the greater degree of protection. sun protection factor A measure, expressed […]