BLUE a.
e spar; lazulite. See Lazulite. -- Blue thrush (Zoöl.), a European and Asiatic thrush (Petrocossyphus cyaneas). -- Blue verditer. See Verditer. -- Blue vitriol (Chem.), sulphate of copper, a violet blue crystallized salt, used in electric batteries, calico printing, etc. -- Blue water, the open ocean. -- To look b…
ROCK n.
ar, petroleum. -- Rock thrush (Zoöl.), any Old World thrush of the genus Monticola, or Petrocossyphus; as, the European rock thrush (M. saxatilis), and the blue rock thrush of India (M. cyaneus), in which the male is blue throughout. -- Rock tripe (Bot.), a kind of lichen (Umbilicaria Dillenii) growing on rocks in th…