Stephanian
adjective
Ste·pha·nian
stə̇ˈfānēən,
-nyən
: of or relating to a division of the Carboniferous
Word History
Etymology
French stéphanien, from (Sanctus) Stephanus (Latin form of Saint-Étienne, city in central France where a carboniferous basin representing this division is found) + French -ien -ian