Definitions for: Cachinnation

[n] loud convulsive laughter

Webster (1913) Definition: Cach`in*na"tion (k[a^]k`[i^]n*n[=a]"sh[u^]n), n.
[L. cachinnatio, fr. cachinnare to laugh aloud, cf. Gr.
kacha`zein.]
Loud or immoderate laughter; -- often a symptom of hysterical
or maniacal affections.

Hideous grimaces . . . attended this unusual
cachinnation. --Sir W.
Scott.

See Also: laugh, laughter