What is "metallic tinking"

Metallic \Me*tal"lic\, a. [L. metallicus, fr. metallum: cf. F. m['e]tallique. See Metal.]

1. Of or pertaining to a metal; of the nature of metal; resembling metal; as, a metallic appearance; a metallic alloy.

2. (Chem.) Of, pertaining to, or characterized by, the essential and implied properties of a metal, as contrasted with a nonmetal or metalloid; conductive of electricity; basic; forming positive ions in solution; antacid.

   Metallic iron, iron in the state of the metal, as distinquished from its ores, as magnetic iron.

   Metallic paper, paper covered with a thin solution of lime, whiting, and size. When written upon with a pewter or brass pencil, the lines can hardly be effaced.

   Metallic tinking (Med.), a sound heard in the chest, when a cavity communicating with the air passages contains both air and liquid.