Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Something designed or intended for use in conjunction with another.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun computing A plug-in.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

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