— cachinnation , n. — cachinnator , n. — cachinnatory /kak"euh neuh tawr'ee, -tohr'ee, keuh kin"euh-/ , adj.
/kak"euh nayt'/ , v.i. , cachinnated, cachinnating .
to laugh loudly or immoderately.
[ 1815-25; cachinnatus (ptp. of cachinnare to laugh aloud, laugh immoderately), equiv. to cachinn- laugh aloud + -atus -ATE 1 ]