The Collaborative International Dictionary
Gelastic
Gelastic \Ge*las"tic\, a. [Gr. ? inclined to laugh, from ? to
laugh.]
Pertaining to laughter; used in laughing. ``Gelastic
muscles.''
--Sir T. Browne.
Wiktionary
gelastic
a. 1 Pertaining to laughter, used in laughing, or to be the subject of laughter. 2 A particularly severe form of epileptic fit.
Usage examples of "gelastic".
There is even a form of seizures called gelastic seizures that causes sufferers to laugh incessantly.