Lewis & Short

physis, is, f., = φύσις, nature.

  1. I. Lit.: seu cupis genitor vocari et auctor orbis aut physis ipsa Panque, Poët. in Anth. Lat. t. 2, p. 474 Burm.
  2. II. In partic., partycolored precious stones which had no distinctive name, freaks of nature, Plin. 37, 12, 74, § 195.