D defs.my
Entry 1 sense Webster, 1913

Matross

· Ma·tross · IPA /məˈtɹɒs/
01 n. Formerly, in the British service, a gunner or a gunner's mate; one of the soldiers in a train of artillery, who assisted the gunners in loa…
  1. 1.
    Formerly, in the British service, a gunner or a gunner's mate; one of the soldiers in a train of artillery, who assisted the gunners in loading, firing, and sponging the guns.(Mil.) [Obs.]