Commensal
Commensal , noun
[Late Latin commensalis; Latin com- + mensa table: compare French commensal. Compare Mensal.]
1.
One who eats at the same table. [Obsolete]
2.
(Zoology) 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.
Commensal , adjective
Having the character of a commensal.