jet·ti·son (jĕtĭ-sən, -zən)
tr.v. jet·ti·soned, jet·ti·son·ing, jet·ti·sons
1. To cast overboard or off: a ship jettisoning wastes; a pilot jettisoning aircraft fuel.
2. Informal To discard (something) as unwanted or burdensome: jettisoned the whole marketing plan.
1. The act of discarding or casting overboard.
[From Middle English jetteson, a throwing overboard of goods to lighten ship, from Anglo-Norman getteson, from Vulgar Latin *iectātiō, iectātiōn-, from *iectātus, past participle of *iectāre, to throw; see JET2.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.