The Collaborative International Dictionary of English v.0.48:

Choreus \Cho*re"us\, Choree \Cho*ree"\, n. [L. choreus, Gr. ?,
   prop. an adj. meaning belonging to a chorus; cf. F.
   chor['e]e.] (Anc. Pros.)
   (a) a trochee.
   (b) A tribrach.
       [1913 Webster]