From The Collaborative International Dictionary of English v.0.48 :
lateen \la*teen"\, a.
1. (Naut.) Of or pertaining to a peculiar rig used in the
Mediterranean and adjacent waters, esp. on the northern
coast of Africa; pertaining to a lateen sail. See below.
[1913 Webster]
2. rigged with a triangular (lateen sail).
Syn: lateen-rigged.
[WordNet 1.5]
From WordNet (r) 3.0 (2006) :
lateen
adj 1: rigged with a triangular (lateen) sail [syn: lateen,
lateen-rigged]
n 1: a triangular fore-and-aft sail used especially in the
Mediterranean [syn: lateen, lateen sail]