1. An opening or a cavity into which an inserted part is designed to fit: a light-bulb socket.
a. The concave part of a joint that receives the end of a bone.
b. A hollow or concavity into which a part, such as the eye, fits.
tr.v. sock·et·ed, sock·et·ing, sock·ets
To furnish with or insert into a socket.
[Middle English soket, from Anglo-Norman, spearhead, diminutive of soc, plowshare, probably of Celtic origin; see sū- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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:
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.