Definition of septarium in English:

septarium

noun

Geology
  • A concretionary nodule, typically of ironstone, having radial cracks filled with calcite or another mineral.

    • ‘Large dolostone septaria and iron sulfide nodules occur in the Late Devonian Huron Shale.’
    • ‘Dolostone septaria and iron sulfide nodules occur in the Late Devonian Huron Shale.’
    • ‘Matrix minerals of the dolostone septaria are ferroan dolomite, quartz, calcite, and pyrite.’
    • ‘Phosphatic nodules, large dolostone septaria, iron sulfide nodules, and crystal-lined vugs are present.’
    • ‘Iron oxide nodules are commonly septaria, exhibiting networks of thin veins of coarsely granular calcite.’

Origin

Late 18th century: modern Latin, from Latin septum enclosure.

Pronunciation:

septarium

/sɛpˈtɛːrɪəm/