placket

noun6

1. •
   A slit or other opening in an item of clothing, to allow access to pockets or fastenings

   • Dislike dressing together. Nicked myself shaving. Biting her nether lip, hooking the placket of her skirt. — 1922
2. •
   (historical) A leather jacket strengthened with strips of steel.
3. •
   (historical) An additional plate of steel on the lower half of the breastplate or backplate.
4. •
   (no longer used) A petticoat, especially an underpetticoat.

   • Is there no manners left among maids?VVill they vveare their plackets vvhere they should bear their faces? — 1610
5. •
   (slang, no longer used) A woman.

   • […]: after this,the vengeance on the vvhole Camp,or rather,the bone-ach,for that,me thinkes is the curse dependant on those that vvarre for a placket. — 1602
6. •
   (no longer used) A woman's pocket.