From Medieval Latin terra sigillāta (literally “sealed, stamped earth”).
terra sigillata (uncountable)
- A type of astringent earth or clay originally from the Greek islands, formerly used as a medicine and antidote.
1997, Roy Porter, The Greatest Benefit to Mankind, Folio Society, published 2016, page 77:
Terra sigillata (sealed earth) was a greasy clay, containing silica, alumina, chalk, magnesia and oxide of iron, found on the Greek islands of Lemnos, Melos and Samos.
- (archaeology) A type of fine, red Roman pottery made from the first to the third centuries AD in Gaul.
- Hyponym: Samian ware