Hÿ'per-stēne or Hÿ'per-sthēne, n.
n. [Fr. hyperstène, from Gr. ὑπέρ, over, beyond, and σθένος, strength.] (Min.) A foliated variety of either augite or hornblende, of a grayish or greenish black color. Dana.
n. [Fr. hyperstène, from Gr. ὑπέρ, over, beyond, and σθένος, strength.] (Min.) A foliated variety of either augite or hornblende, of a grayish or greenish black color. Dana.