• Webster's Revised Unabridged Dictionary
    • n Neocomian (Geol) A term applied to the lowest deposits of the Cretaceous or chalk formation of Europe, being the lower greensand.
    • a Neocomian (Geol) Of or pertaining to the lower greensand.
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Century Dictionary and Cyclopedia
    • n neocomian In geology, the name given to the lower division of the Cretaceous system. The Neocomian includes the Lower Greensand and the Wealden of the English geologists. In the present more generally adopted nomenclature of the Cretaceous subgroups in France and Belgium, the Neocomian includes the Hauterivian and the Valenginian. The typical region of the Neocomian is in the Jura, especially near Neuchâtel, in Switzerland, and also in the south of France, where the series reaches a thickness of 1,600 feet, the rocks being chiefly limestones and marls.
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Chambers's Twentieth Century Dictionary
    • adj., n Neocomian nē-ō-kō′mi-an (geol.) of or pertaining to the lower division of the Cretaceous system, including the Lower Greensand and the Wealden of English geologists.
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Webster's Revised Unabridged Dictionary
From Neocomium, the Latin name of Neuchatel, in Switzerland, where these rocks occur
Chambers's Twentieth Century Dictionary
Græcised from Neuchâtel, near which is its typical region; Gr. neos, new, kōmē, a village.


In literature:

Our forms were rolled in the clinging mold Of a Neocomian shore.
"The Home Book of Verse, Vol. 4 (of 4)" by Various
Lower Greensand or Neocomian, / 3.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
Pass to the Urgonian beds, resting directly upon the Neocomian, and there is not one to be found, and an entirely new species comes in.
"Atlantic Monthly, Vol. 12, August, 1863, No. 70" by Various
The marine fauna of Sunday river indicates a Neocomian age.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2" by Various
In Cutch and Kathiawar they are underlaid by Jurassic and Neocomian beds.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2" by Various