Definition of chalcedonic in US English:

chalcedonic

adjective

  • See chalcedony

    • ‘The chalcedonic buckle found at Monor may be classed to this type in spite of its slight variation.’
    • ‘There is no chalcedonic quartz anywhere within or on the specimen.’
    • ‘The Main vein is 7-8 feet thick, extends for 300 feet along strike, and consists of chalcedonic quartz.’
    • ‘Under the microscope it shows the same structure, the same distribution of crypto crystalline ground mass, which is chalcedonic in character.’
    • ‘The formation is composed largely of dark limestone and dolomite, and contains black chalcedonic chert in fine laminated layers, a piece of which is displayed near the bottom of this page.’

Pronunciation

chalcedonic

/ˌkalsəˈdänik/