Chesterian
/tʃɛˈstɪəriən/noun
A North American geological stage or anything relating to the Chesterian Stage of the Mississippian Period.
Did you know?The geological term Chesterian was named after Chester, Illinois, whose name descends through Old English ceaster from Latin castrum, meaning a fortified military camp.
Etymological Timeline
Classical Latin
Latin
castrum
“A fortified military camp or defensive stronghold.”
Late Latin
Latin
castra
“A military camp, commonly used in the plural for a permanent army base.”
5th–7th Century
Old English
ceaster
“A Roman fortification, fortified town, or city—used especially in place-names.”
Medieval English
English
Chester
“A place-name element referring to a Roman fort or fortified settlement.”
19th Century
English
Chesterian
“A geological adjective formed from Chester, Illinois, identifying a regional Mississippian stage.”
Modern English
English
Chesterian
“Relating to the Chesterian Stage, a subdivision of the Mississippian geological period.”