Webster's Revised Unabridged Dictionary · 1913

Philippic

Philippic , noun

[Latin Philippiko`s belonging to Philip, Philippic, Greek filippikos, from Fi`lippos Philip, fi`lippos fond of horses: compare French philippique.]

1.
Any one of the series of famous orations of Demosthenes, the Grecian orator, denouncing Philip, king of Macedon.
2.
Hence: Any discourse or declamation abounding in acrimonious invective.