in·ter·me·di·ar·y 
(ĭn′tər-mēdē-ĕr′ē)
(ĭn′tər-mēdē-ĕr′ē)adj.
1. Existing or occurring between; intermediate.
2. Acting as a mediator or an agent between persons or things.
n. pl. in·ter·me·di·ar·ies
1. One that acts as a mediator.
2. One that acts as an agent between persons or things; a means.
3. An intermediate state or stage.
[Probably French intermédiaire, from Late Latin intermedius, intermediate; see INTERMEDIATE.]