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stud 1 (stŭd)
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n.
1. An upright post in the framework of a wall for supporting sheets of lath, drywall, or similar material.
2. A small knob, nail head, or rivet fixed in and slightly projecting from a surface.
3.
a. A small ornamental button mounted on a short post for insertion through an eyelet, as on a dress shirt.
b. A buttonlike earring or other piercing mounted on a slender post, as of gold or steel.
4.
a. Any of various protruding pins or pegs in machinery, used mainly as a support or pivot.
b. One of a number of small metal cleats embedded in a snow tire to increase traction on slippery or snowy roads.
5. A metal crosspiece used as a brace in a link, as in a chain cable.
tr.v. stud·ded, stud·ding, studs
1. To provide with or construct with studs or a stud.
2. To set with studs or a stud: stud a bracelet with rubies.
3. To be scattered over: Daisies studded the meadow.

[Middle English stode, from Old English studu; see stā- 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.
 
stud 2 (stŭd)
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n.
1.
a. A group of animals, especially horses, kept for breeding.
b. A male animal, such as a stallion, that is kept for breeding.
c. A stable or farm where these animals are kept.
2. Slang
a. A usually young man who is very sexually active or promiscuous.
b. A usually young man regarded as attractive and physically fit.
3. Slang A person who is extremely competent in a given area.
4. Games Stud poker.
Idiom:
at stud
Available or offered for breeding. Used of animals.

[Middle English stod, establishment for breeding horses, from Old English stōd; see stā- 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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