partlet

noun2

1. •
   (historical) A covering for the neck and upper chest, originally worn by both sexes, but later especially by women to cover a low neckline.

   • On 1 February 1505, he ordered a new set of clothes for prince: an arming doublet of black satin, with fashionable detachable sleeves, and with it an arming partlet or under-collar […] — 2011
2. •
   (no longer used) A hen (originally in the form Dame Partlet).

   • How now, dame Partlett the hen? — 1597