la·teen 
(lə-tēn, lă-) Nautical
(lə-tēn, lă-) Nautical adj.
Being, relating to, or rigged with a triangular sail hung on a long yard that is attached at an angle to the top of a short mast.
n.
1. A lateen-rigged boat.
2. A lateen sail.
[French (voile) latine, lateen (sail), feminine of Latin, Latin (from its use in the Mediterranean), from Old French; see LATIN.]
lateen