Lewis & Short

sternūmentum, i, n. [sternuo], a sneezing (class.; but cf. sternutamentum).

  1. I. Lit., Cic. Div. 2, 40, 84; Plin. 2, 7, 5, § 24; 21, 22, 93, § 163; 25, 5, 21, § 52; 28, 6, 15, § 57; Gell. 12, 5, 11; Cels. 3, 20; 8, 4; 8, 9.
  2. II. Transf., a means of provoking sneezing, sneezing-powder, Cels. 6, 7, 9; Plin. 25, 11, 86, § 135; 25, 13, 109, § 173.