[ sep-tair-ee-uhn ]

  1. being or relating to a septarium, a nodule or mass of limestone, ironstone, etc., with a network of cracks inside it filled with calcite and other minerals: The creation of these septarian concretions began about 60 million years ago when muddy sediment slowly accumulated on the seafloor.

Origin of septarian

First recorded in 1815–25; septari(um) + -an
  • Rarely sep·tar·i·ate [sep-tair-ee-it] /sɛpˈtɛər i ɪt/ .

Words Nearby septarian Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use septarian in a sentence