The Collaborative International Dictionary of English v.0.48:

Calculous \Cal"cu*lous\, a. [L. calculosus.]
   1. Of the nature of a calculus; like stone; gritty; as, a
      calculous concretion. --Sir T. Browne.
      [1913 Webster]

   2. Caused, or characterized, by the presence of a calculus or
      calculi; a, a calculous disorder; affected with gravel or
      stone; as, a calculous person.
      [1913 Webster]

WordNet (r) 3.0 (2006):

calculous
    adj 1: relating to or caused by or having a calculus or calculi