| a. | 1. | Of the nature of clay; consisting of, or containing, argil or clay; clayey.
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| Adj. | 1. | argillaceous - resembling or containing clay; "argillaceous rocks" Synonyms: clayey Antonyms: arenaceous, sandlike, sandy - resembling or containing sand; or growing in sandy areas; "arenaceous limestone"; "arenaceous grasses" |
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