musca

/M AH1 S K AH0/
noun
  1. 1

    (astronomy) An autumn constellation of the southern sky, said to resemble a fly, between the constellations of Carina and Apus.

  2. 2

    Ellipsis of musca volitans. [floater (threadlike speck in the visual field)]

  3. 3

    (trading) Initialism of Mexico-United Statesโ€“Canadaโ€“Agreement.