Glaucus (from Latin glaucus, from Ancient Greek γλαυκός (glaukós) “blue-green, blue-grey”) is used to describe the pale gray or bluish-green appearance of the surfaces of some plants, as well as in the names of birds. , such as the northern gull (Larus hyperboreus), northern gull (Larus glaucescens), northern gull (Anodorhynchus glaucus) and northern gull (Thraupis glaucocolpa). The term glaucous is also used as an adjective in botany, meaning “covered with a grayish, bluish, or whitish waxy coating or easily removed bloom” (e.g., glaucous leaves). The first recorded use of Glaucous as a color name in English was in 1671.