/ dʒeɪd; NAmE / noun [ U ]
1.
a hard stone that is usually green and is used in making jewellery and decorative objects :
a jade necklace
2.
objects made of jade :
a collection of Chinese jade
3.
(also ˌjade ˈgreen ) a bright green colour
••
WORD ORIGIN
late 16th cent.: from French le jade (earlier l'ejade ), from Spanish piedra de ijada stone of the flank (i.e. stone for colic, which it was believed to cure).