• Webster's Revised Unabridged Dictionary
    • a Senonian (Geol) In european geology, a name given to the middle division of the Upper Cretaceous formation.
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Century Dictionary and Cyclopedia
    • n senonian In geology, a division of the Upper Cretaceous in France and Belgium. The term is also used to some extent in English geology. The Senonian lies between the Turonian and the Danian, and is subdivided into the Santonian and Campanian: it corresponds to the “Upper Chalk with flints” of the English Cretaceous, which is there essentially a white pulverulent mass of chalk, with flints arranged in nearly parallel layers. Although exhibiting in England a remarkable uniformity of lithological character from top to bottom, it has been shown to be paleontologically separable into several distinct zones closely resembling those into which the chalk of the northern Cretaceous basin of France has been divided.
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Chambers's Twentieth Century Dictionary
    • n Senonian sē-nō′ni-an (geol.) a division of the upper Cretaceous in France and Belgium.
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Webster's Revised Unabridged Dictionary
F. sénonien, from the district of Sénonais, in France


In literature:

In 283, at Lake Vadimonis, the Romans defeated the Senonian and Boian Gauls, and founded the military colony of SENA GALLICA.
"History of Rome from the Earliest times down to 476 AD" by Robert F. Pennell
At Lemberg a boring 1650 ft. in depth did not reach the base of the Senonian.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 8" by Various