a.1.(Crystallog.) Possessing the qualities of a prism, obliquely inclined to a rhombic base; monoclinic.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The pigment was hydrated copper acetate Cu[(C[H.sub.3]COO).sub.2] x [H.sub.2]O, a substance consisting of clinorhombic (monoclinic) crystals with a dark bluish-green color.