Optics. glass that has had its polished surface removed by fine grinding and that is used to diffuse light.
glass that has been ground into fine particles, especially for use as an abrasive.
glass that has a rough surface produced by grinding, used for diffusing light
glass in the form of fine particles produced by grinding, used as an abrasive
noun 1. a prostrate yew, Taxus canadensis, of eastern North America, having short, flat needles and red, berrylike fruit.
[ground-hog, -hawg] /ˈgraʊndˌhɒg, -hɔg/ noun 1. . /ˈɡraʊndˌhɒɡ/ noun 1. another name for woodchuck n. 1784, from ground (n.) + hog (n.). Also known colloquially as a whistlepig, and cf. aardvark. Ground Hog Day first recorded 1871, American English.
noun 1. February 2, in most parts of the U.S., the day on which, according to legend, the groundhog first emerges from hibernation. If it is a sunny day and the groundhog sees its shadow, six more weeks of wintry weather are predicted. noun 1. (in the US and Canada) February 2nd, when, according to […]