The Collaborative International Dictionary of English v.0.48:
Jaconet \Jac"o*net\, n. [F. jaconas.] A thin cotton fabric, between cambric and muslin, used for dresses, neckcloths, etc. [Written also jacconet.] [1913 Webster]WordNet (r) 3.0 (2006):
jaconet n 1: a lightweight cotton cloth with a smooth and slightly stiff finish; used for clothing and bandages