D defs.my
Entry 3 senses Webster, 1913

Placket

· Plack·et · IPA /ˈplækɪt/
01 n. A petticoat, esp. an under petticoat; hence, a cant term for a woman.
  1. 1.
    A petticoat, esp. an under petticoat; hence, a cant term for a woman.[Obs.]
  2. 2.
    The opening or slit left in a petticoat or skirt for convenience in putting it on; -- called also placket hole. Also: placket hole
  3. 3.
    A woman's pocket.