Naperian logarithms.
a. [ L. Pierius, from Mount
Drink deep, or taste not the Pierian spring. Pope. [ 1913 Webster ]
n. [ See Peirides. ] (Zool.) Any butterfly of the genus
‖n. pl. [ L., fr. Gr. &unr_;. See Pierian. ] (Class. Myth.) The Muses. [ 1913 Webster ]