Lewis & Short

prae-gusto, āvi, ātum, 1, v. a.

  1. I. To taste beforehand (poet. and in post-Aug. prose): cibos, Ov. Am. 1, 4, 33; Plin. 21, 3, 9, § 12: pocula, Juv. 6, 633: potum regis, Just. 12, 14: caro bestiis praegustata, Vulg. Exod. 22, 31.
  2. II. In gen., to take, eat, or drink beforehand: medicamina, for antidota, Juv. 6, 660.