1. (Min.)
Defn: A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem.
2. (Zoöl.)
Defn: Either one of two species of large, brilliantly colored humming birds of the Topaza, of South America and the West Indies.
Note: The two tail feathers next to the central ones are much longer that the rest, curved, and crossed. The Throat is metallic yellowish- green, with a tint like topaz in the center, the belly is bright crimson, the back bright red. Called also topaz hummer. False topaz. (Min.) See the Note under Quartz.
TOPAZOLITE
To*paz"o*lite, n. Etym: [Topaz + -lite; cf. F. topazolithe.] (Min.)
Defn: A topaz-yellow variety of garnet.
TOP-BLOCK
Top"-block`, n. (Naut.)
Defn: A large ironbound block strapped with a hook, and, when used, hung to an eyebolt in the cap, — used in swaying and lowering the topmast. Totten.
TOP-BOOTS
Top"-boots, n. pl.