D defs.my
Entry 2 senses Webster, 1913

Cadillac

/kăd'-əl-ăkˌ/ · Ca·dil·lac · IPA /ˈkædəˌlæk/
01 n. A large pear, shaped like a flattened top, used chiefly for cooking.
  1. 1.
    A large pear, shaped like a flattened top, used chiefly for cooking.
  2. 2.
    The best; -- metaphorical, from the automobile. Often used in the phrase “the Cadillac of . . . ”