raucous laughter inappropriate laughter, sometimes found in schizophrenia
Collins Concise English Dictionary © HarperCollins Publishers::
cach•in•nate
(kak′ə nāt′),USA pronunciation v.i., -nat•ed, -nat•ing.
cach′in•na′tion, n.
cach′in•na′tor, n.
cach•in•na•to•ry
(kak′ə nə tôr′ē, -tōr′ē, kə kin′ə-),USA pronunciation adj.
- to laugh loudly or immoderately.
- Latin cachinnātus (past participle of cachinnāre to laugh aloud, laugh immoderately), equivalent. to cachinn- laugh aloud + -ātus -ate1
- 1815–25;
cach′in•na′tor, n.