sphragide

noun /ˈsfræd͡ʒaɪd/

1. An aluminous earth of a grayish yellow color; a medicinal clay.

   countable, uncountable

   Dr. Hawks says it is found in Lemnos, sometimes called Terra Lemnia, and used in medicine. It is sometimes called sphragide.

Where it comes from

From Latin sphragis, sphragidis (“Lemnian earth”), from Ancient Greek σφραγίς (sphragís, “a seal”), so called because sold in sealed packets.

Adapted from the Wiktionary entry sphragide (CC BY-SA 4.0).

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