Main Entry: jas·per

Pronunciation: \ˈjas-pər\

Function: noun

Etymology: Middle English jaspre, from Anglo-French jaspre, jaspe, from Latin jaspis, from Greek iaspis, of Semitic origin; akin to Hebrew yāshĕpheh jasper

Date: 14th century

1 : an opaque cryptocrystalline quartz of any of several colors; especially : green chalcedony
2 : colored stoneware with raised white decoration
3 : a blackish green

— jas·pery \-pə-rē\ adjective