n, often attrib  1 a  :  an amorphous inorganic usu. transparent or translucent substance consisting of a mixture of silicates or sometimes borates or phosphates formed by fusion of silica or of oxides of boron or phosphorus with a flux and a stabilizer into a mass that cools to a rigid condition without crystallization  b  :  a substance resembling glass esp. in hardness and transparency <organic es made from plastics>   2 a  :  an optical instrument or device that has one or more lenses and is designed to aid in the viewing of objects not readily seen  b  glasses  pl  :  a device used to correct defects of vision or to protect the eyes that consists typically of a pair of glass or plastic lenses and the frame by which they are held in place - called also eyeglasses  .
 
 
 
Similar sounding terms:  cal·lose  cal·lous  cal·lus  class 
 
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