jetsam

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jetsam:

see flotsamflotsam, jetsam, and ligan
[O.Fr.], in maritime law, goods lost at sea as distinguished from goods washed ashore (wreck). Goods that remain floating on the surface after a shipwreck or accident are called flotsam (or floatsam or flotsan), while jetsam refers to goods thrown
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jetsam

[′jet·səm]
(engineering)
Articles that sink when thrown overboard, particularly those jettisoned for the purpose of lightening a vessel in distress.

jetsam

, jetsom
1. that portion of the equipment or cargo of a vessel thrown overboard to lighten her, as during a storm
2. another word for flotsam