The Collaborative International Dictionary of English v.0.48:

Pesane \Pes"ane\, n. (Anc. Armor.)
   See Pusane.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pusane \Pu"sane\, n. (Anc. Armor)
   A piece of armor for the breast; often, an addition to, or
   re["e]nforcement of. the breastplate; -- called also
   pesane.
   [1913 Webster]