argillaceous

adjective
ar·gil·la·ceous | \ˌär-jə-ˈlā-shəs \

Definition of argillaceous 

: of, relating to, or containing clay or clay minerals : clayey

First Known Use of argillaceous

1676, in the meaning defined above

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Dictionary Entries near argillaceous

argil

argill-

argillaceo-

argillaceous

argillic

argilliferous

argillite

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The first known use of argillaceous was in 1676

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