Webster’s Revised Unabridged Dictionary · 1913
Senonian
Se·no′ni·an, a. [F. sénonien, from the district of Sénonais, in France.] (Geol.) In european geology, a name given to the middle division of the Upper Cretaceous formation.
Webster’s Revised Unabridged Dictionary · 1913
Se·no′ni·an, a. [F. sénonien, from the district of Sénonais, in France.] (Geol.) In european geology, a name given to the middle division of the Upper Cretaceous formation.