argilliferous
Webster's Unabridged Dictionary:
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Ar·gil·lif·er·ous
a.
[L. argilla white clay + -ferous.]
Producing clay; -- applied to such earths as abound with argil. Kirwan.
[L. argilla white clay + -ferous.]
Producing clay; -- applied to such earths as abound with argil. Kirwan.
