Definition of "symphily" [symphily]

• The.occurrence in ant colonies of true guests which are tended by the ants and which usually give out a secretion of which the ants are fond. (noun)

The Century Dictionary (Public Domain)

• "Metochy: the relation borne to ants by the tolerated guests in ant-hills; demanding nothing from and giving nothing to the ants; see symphily and synecthry."