plattnerite

[After the German chemist Plattner; suff. -ite ( Min.).] Min.: A mineral stated to have been found at Lead hills, Lan arks hire, in hexagon a! prisms with truncated basal edges. Specific gravity, 9-39-9-45; luster, metallic, adamantine; color, iron-black; streak, brown; opaque. Composition: Lead, 86.6, oxygen, 13.4=100, corresponding with the formula, PbO2. Dana says, "a doubtful species." plăt-ür-ŭs, subst . [Pref. plat- , and Gr. our a =a tail.] Zool .: A genus of Hydrophide, with two species, ranging from the Bay of Bengal to New Guinea and New Zealand. plāt, adj. [Eng. plat (e); -y.] Like a plate; consisting of plates. plăt-ý-, pref . [Gr. platys =flat.] Flat or broad. plăt-ý-çě-phăl-ic, plăt-ý-çeph-a-lous, adj . [Greek platy kep halos =broad-headed: pref. platy- , and Gr. kephale = the head.] Broad-headed, flat headed. plăt-ý-çěph-a-lus, s. [PLATYCEPHALIC.] Ichthyol.: A genus of Scorpænide. Head much depre ed, more or le armed with spines. They inhabit the Indian coasts, hiding themselves in the sand, watching for their prey. About forty species are known.