cor·se·let 
(kôrslĭt)
(kôrslĭt)n.
1. also cors·let (kôrslĭt) Body armor, especially a breastplate.
2. also cor·se·lette (kôr′sə-lĕt) An undergarment that is a combination of a light corset and a brassiere.
[French, diminutive of Old French cors, body; see CORSET.]