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plumbous (adj.)

1680s, "leaden;" 1854 in chemistry sense, "containing lead" (especially in a low valence), from Latin plumbosus "full of lead," from plumbum (see plumb (n.)).

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Definitions of plumbous from WordNet

plumbous (adj.)
relating to or consisting of lead;
Synonyms: plumbic
From wordnet.princeton.edu