placket

[plak-it] /ˈplæk ɪt/
noun
1.
the opening or slit at the top of a skirt, or in a dress or blouse, that facilitates putting it on and taking it off.
2.
a pocket, especially one in a woman's skirt.
3.
Archaic.
  1. a petticoat.
  2. a woman.
Origin
1595-1605; variant of placard breastplate < Old French, derivative of plaquier to plate < Middle Dutch placken to patch; cf. plaque
Examples from the web for placket
  • Flannel- lined body, snap-over storm placket, and side snaps all add insulation and help adjust the fit against brisk winds.
British Dictionary definitions for placket

placket

/ˈplækɪt/
noun (dressmaking)
1.
a piece of cloth sewn in under a closure with buttons, hooks and eyes, zips, etc
2.
the closure itself
Word Origin
C16: perhaps from Middle Dutch plackaet breastplate, from Medieval Latin placca metal plate