argillaceous

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌɑːdʒɪˈleɪʃəs/US:USA pronunciation: respellingUSA pronunciation: respelling(är′jə lā′shəs)


WordReference Random House Unabridged Dictionary of American English © 2026
ar•gil•la•ceous  (är′jə lā′shəs),USA pronunciation adj. 
  1. Geology, Rocksof the nature of or resembling clay;
    clayey.
  2. Geologycontaining a considerable amount of clayey matter.
  • Latin argillāceus clayish. See argil, -aceous
  • 1725–35

Collins Concise English Dictionary © HarperCollins Publishers::
argillaceous / ˌɑːdʒɪˈleɪʃəs/
  1. (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
    Compare arenaceous1, rudaceous
'argillaceous' also found in these entries (note: many are not synonyms or translations):
arenaceous - bluestone - hornfels - pipestone - rudaceous - septarium - shale

Forum discussions with the word(s) "argillaceous" in the title:


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