argillaceous

ar·gil·la·ceous

A0417500 (är′jə-lā′shəs) or ar·gil·lic (är-jĭl′ĭk)adj. Containing, made of, or resembling clay; clayey.

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[From Latin argillāceus, from argilla, argil; see argil.]

argillaceous

(ˌɑːdʒɪˈleɪʃəs) adj (Geological Science) (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc. Compare arenaceous¹, rudaceous

ar•gil•la•ceous

(ˌɑr dʒəˈleɪ ʃəs)

adj. of the nature of or resembling clay; clayey. [1725–35; < Latin argillāceus <argilla clay]

Thesaurus

Adj.

1.

argillaceous - resembling or containing clay; "argillaceous rocks"clayeyarenaceous, sandlike, sandy - resembling or containing or abounding in sand; or growing in sandy areas; "arenaceous limestone"; "arenaceous grasses"