field glass vs lunette

field glass

noun
  • The larger of the image lenses of an optical device. 

  • A pair of binoculars for observing "in the field". 

  • A small monocular refracting telescope. 

lunette

noun
  • See lunettes. 

  • A luna: a crescent-shaped receptacle, often glass, for holding the (consecrated) host (the bread of communion) upright when exposed in the monstrance. 

  • A field work consisting of two projecting faces forming a wedge each of which extends from one of two parallel flanks. 

  • A type of flattened glass used in watch-making. 

  • A small opening in a vaulted roof of a circular or crescent shape. 

  • A half horseshoe, lacking the sponge. 

  • A piece of felt to cover the eye of a vicious horse. 

  • A type of crescent-shaped dune blown up along a lake basin, especially in dry areas of Australia. 

  • An iron shoe at the end of the stock of a gun carriage. 

  • The circular hole in the guillotine in which the victim's neck is placed. 

  • A crescent-shaped recess or void in the space above a window or door. 

How often have the words field glass and lunette occurred in a corpus of books? (source: Google Ngram Viewer )