Lewis & Short

limpĭdus, a, um, adj. [Gr. λάμπω; cf. lepor, O-lymp-us],

  1. I. clear, bright, pellucid, transparent, limpid (poet and in post-Aug. prose): lacus, Cat. 4, 24: limpidior aqua fiet, Vitr. 8, 7: vinum limpidissimum, Col. 12, 28, 3: limpidae chrysolithi, Plin. 37, 9, 42, § 126: alumen, id. 35, 15, 52, § 184.
  2. II. Transf., pure, clean: panis, Cael. Aur. Tard. 1, 1, 2: linimentum, id. ib. 1, 1, 34: lana, id. Acut. 2, 18, 103.
    Hence, lim-pĭdē, adv., clearly, Cael. Aur. Tard. 4, 3, 30.
  3. II. Trop.: perspicere, Cael. Aur. Tard. 4, 1, 6.