Cachinnatory
The Century Dictionary and Cyclopedia
Of or pertaining to cachinnation; relating to or consisting in loud laughter.
the GNU version of the Collaborative International Dictionary of English
adjective.
Consisting of, or accompanied by, immoderate laughter.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Consisting of, or accompanied by,
immoderate
laughter
.