jib vs watch glass

jib

noun
  • A crane used for mounting and moving a video camera. 

  • The projecting arm of a crane. 

  • An object that is used for performing tricks while skiing, snowboarding, skateboarding, in-line skating, or biking. These objects are usually found in a terrain park or skate park. 

  • Crystal meth. 

  • The mouth, sometimes particularly the tongue, underlip, or tooth. 

  • One who jibs or balks, refusing to continue forward. 

  • Any of a variety of specialty triangular staysails set forward of the foremast. 

  • A triangular staysail set forward of the foremast. In a sloop (see image) the basic jib reaches back roughly to the level of the mast. 

  • A stationary condition; a standstill. 

verb
  • To shift, or swing around, as a sail, boom, yard, etc., as in tacking. 

  • To stop and refuse to go forward (usually of a horse). 

  • To stop doing something, to become reluctant to proceed with an activity. 

watch glass

noun
  • An item of glass laboratory equipment consisting of a simple, slightly concave circle of glass. It is a general utility item, used to hold small samples, to evaporate liquids, to cover a beaker, and so on. 

  • A sandglass. 

  • The glass covering of the face of a watch. 

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