pearl vs whalebone

pearl

noun
  • A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Round lustrous pearls are used in jewellery. 

  • Something precious. 

  • A light-colored tern. 

  • A fish allied to the turbot; the brill. 

  • A whitish speck or film on the eye. 

  • A capsule of gelatin or similar substance containing liquid for e.g. medicinal application. 

  • Nacre, or mother-of-pearl. 

  • One of the circle of tubercles which form the bur on a deer's antler. 

  • A fringe or border. 

  • A valuable little nugget of information; especially, an aphorism or tip that is operationally useful for decision-making. 

  • The clitoris. 

verb
  • To cause to resemble pearls in shape; to make into small round grains. 

  • To cause to resemble pearls in lustre or iridescence. 

  • To resemble pearl or pearls. 

  • To sink the nose of one's surfboard into the water, often on takeoff. 

  • To set or adorn with pearls, or with mother-of-pearl. 

  • Of the nose of the surfboard: to sink in this manner. 

  • To hunt for pearls 

whalebone

noun
  • The horny material from the fringed plates of the upper jaw of baleen whales that are used to filter plankton; once used as stays in corsets 

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