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Webster 1913 Edition

Adj.

[L.

Pierius

, from Mount

Pierus

, in Thessaly, sacred to the Muses.]

Of or pertaining to Pierides or Muses.

Drink deep, or taste not the

Pierian

spring.

Pope.

Pierian ‎(comparative more Pierian, superlative most Pierian)

Of or relating to Pierides or Muses.
- 1711, Alexander Pope, An Essay on Criticism:
  Drink deep, or taste not the Pierian spring.