Com*men"sal (?), n. [LL. commensalis; L. com- + mensa table: cf. F. commensal. Cf. Mensal.]
1.
One who eats at the same table.
[Obs.]
2. Zool.
An animal, not truly parasitic, which lives in with, or on, another, partaking usually of the same food. Both species may be benefited by the association.
© Webster 1913.
Com*men"sal (?), a.
Having the character of a commensal.
© Webster 1913.