[in-ter-dee-pahrt-men-tl, -di-pahrt-] 
| involving or existing between two or more departments: interdepartmental rivalry. |
| in·ter·de·part·men·tal (ĭn'tər-dē'pärt-měn'tl) adj. Involving or representing different departments, as of a business, an academic institution, or a government: "the petty interdepartmental squabbling that surrounds the making of . . . foreign policy" (Morton A. Reichek). |
tərˌdi