Main Entry: chal·ce·do·ny

Pronunciation: \kal-ˈse-d^ən-ē, chal-; ˈkal-sə-ˌdō-nē, ˈchal-, -ˌdä-\

Function: noun

Inflected Form(s): plural chal·ce·do·nies

Etymology: Middle English calcedonie, a precious stone, from Anglo-French, from Late Latin chalcedonius, from Greek Chalkēdōn Chalcedon

Date: 13th century

: a translucent variety of quartz of various colors and waxy luster

— chal·ce·don·ic \ˌkal-sə-ˈdä-nik\ adjective