Etymology
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calculous (adj.)

c. 1600, "of or pertaining to a bodily concretion;" 1670s, "stony, stone-like;" from Latin calculosus and (in the medical sense) directly from calculus "a pebble," diminutive of calx (genitive calcis) "limestone" (see chalk (n.)).

updated on September 20, 2017

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Definitions of calculous from WordNet

calculous (adj.)
relating to or caused by or having a calculus or calculi;
From wordnet.princeton.edu, not affiliated with etymonline.