(1):

(a.) Of or pertaining to a pyrrhic, or to pyrrhics; containing pyrrhic; as, a pyrrhic verse.

(2):

(n.) A foot consisting of two short syllables.

(3):

(a.) Of or pertaining to an ancient Greek martial dance.

(4):

(n.) An ancient Greek martial dance, to the accompaniment of the flute, its time being very quick.