Senonian

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Senonian \Se*no"ni*an\, a. [F. s['e]nonien, from the district of
     S['e]nonais, in France.] (Geol.)
     In european geology, a name given to the middle division of
     the Upper Cretaceous formation.
     [1913 Webster] Senyor