sen·a·to·ri·al /ˌsɛnəˈtoriəl, ˈtɔr-/
(a.)參議院的,參議員的
Sen·a·to·ri·al a.
1. Of or pertaining to a senator, or a senate; becoming to a senator, or a senate; as, senatorial duties; senatorial dignity.
2. Entitled to elect a senator, or by senators; as, the senatorial districts of a State. [U. S.]
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senatorial
adj : of or relating to senators; "senatorial election"