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jet 1 (jĕt)
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n.
1. A dense black coal that takes a high polish and is used for jewelry.
2. A deep black.
adj.
1. Made of or resembling a dense, black, highly polished coal.
2. Black as coal; jet-black: jet hair.

[Middle English get, jet, from Anglo-Norman geet, jeet, from Latin gagātēs, from Greek, lignite, jet, after Gagai, a town of Lycia (near present-day Kumluca, Turkey), where pieces of lignite could be found washed out at the mouth of the local river.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
jet 2 (jĕt)
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n.
1.
a. A high-velocity fluid stream forced under pressure out of a small-diameter opening or nozzle.
b. An outlet, such as a nozzle, used for emitting such a stream.
c. Something emitted in or as if in a high-velocity fluid stream: "such myriad and such vivid jets of images" (Henry Roth).
2.
a. A jet-propelled vehicle, especially a jet-propelled aircraft.
b. A jet engine.
v. jet·ted, jet·ting, jets
v.intr.
1. To travel by jet aircraft: jetted from Houston to Los Angeles.
2. To move very quickly.
v.tr.
To propel outward or squirt, as under pressure: "Any man might ... hang around ... jetting tobacco juice" (Ross Lockridge, Jr.)

[French, from Old French, from jeter, to spout forth, throw, from Vulgar Latin *iectāre, alteration of Latin iactāre, frequentative of iacere, to throw; see yē- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

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:

    Indo-European Roots

    Semitic Roots

    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.

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