D defs.my
Entry 1 sense Webster, 1913

Platoon

/plət-o͞on'/ · Pla·toon · IPA /pləˈtuːn/
01 n. Formerly, a body of men who fired together; also, a small square body of soldiers to strengthen the angles of a hollow square.
  1. 1.
    Formerly, a body of men who fired together; also, a small square body of soldiers to strengthen the angles of a hollow square.(Mil.)