Glaucous (from the Latin glaucus meaning bluish-grey or green from the Greek glaukós) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants as well as in the names of birds such as the Glaucous Gull (Larus hyperboreus) Glaucous-winged Gull (Larus glaucescens) Glaucous Macaw (Anodorhynchus glaucus) and Glaucous Tanager (Thraupis glaucocolpa).The term glaucous is also used botanically as an adjective to mean covered with a greyish bluish or whitish waxy coating or bloom that is easily rubbed off (e.g.
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