amicuscuriae

a·mi·cus cu·ri·ae (ə-mē'kəs kyo͝orʹē-ī') n. pl. a·mi·ci curiae (ə-mē'kē)

A party that is not involved in a particular litigation but that is allowed by the court to advise it on a matter of law directly affecting the litigation.

  [Latin amīcus cūriae: amīcus, friend + cūriae, genitive of cūria, court.]

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