INTERACT
In`ter*act", v. i.

Defn: To act upon each other; as, two agents mutually interact.
Emerson. Tyndall.

INTERACTION
In`ter*ac"tion, n.

1. Intermediate action.

2. Mutual or reciprocal action or influence; as, the interaction of the heart and lungs on each other.

INTERADDITIVE
In`ter*ad"di*tive, a.

Defn: Added or placed between the parts of another thing, as a clause inserted parenthetically in a sentence.

INTERAGENCY
In`ter*a"gen*cy, n.

Defn: Intermediate agency.

INTERAGENT
In`ter*a"gent, n.