sep·tar·i·um (s p-târ  - m)n. pl. sep·tar·i·a (- -) An irregular polygonal system of calcite-filled cracks occurring in certain rock concretions. [Latin saeptum, partition; see septum + -arium.] sep·tar i·an adj. |
septarium [sɛpˈtɛərɪəm]
n pl -ia [-ɪə]
(Earth Sciences / Geological Science) a mass of mineral substance having cracks filled with another mineral, esp calcite
[from New Latin, from Latin septum]
septarian adj
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