Lewis & Short

† sphaeristērĭum, ii, n., = σφαιριστήριον.

  1. I. Lit., a place for playing ball, a ball-court, tennis-court, Plin. Ep. 2, 17, 12; 5, 6, 27; Suet. Vesp. 20; Inscr. Orell. 57.
  2. II. Transf., a game at ball, Lampr. Alex. Sev. 30; Sid. Ep. 2, 2 med.