placket

Meanings

1. A slit or other opening in an item of clothing, to allow access to pockets or fastenings
2. A petticoat, especially an underpetticoat.
3. A woman.
4. A woman's pocket.
5. A leather jacket strengthened with strips of steel.
6. An additional plate of steel on the lower half of the breastplate or backplate.

Etymology

From French plaquer (“to lay or clap on”). See placard.