cachinnation

N การหัวเราะ เสียงดัง 

CACHINNATION

n.A variety of chalcedony, which is a subspecies of quartz, usually milk white, some times grayish or yellowish white; opake or slightly translucent at the edges. Its fracture is even, or conchoidal with large cavities, sometimes dull, sometimes pearly or glossy. It often envelops common chalcedony; the two minerals being united by insensible shades. It also associates with flint and semi-opal.

CACHINNATION

Cach `in *na "tion, n. Etym: [L. cachinnatio, fr. cachinnare to laugh aloud, cf Gr.