Definitions

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

  • noun An association between two organisms of different species in which one is harmed or inhibited while the other is unaffected.

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

  • noun A form of symbiosis in which one species is harmed or impeded and the other is unaffected.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Probably a– + (com)mensalism.]

Examples

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