Lewis & Short

plastĭcus, a, um, adj., = πλαστικός,

  1. I. of or belonging to moulding or modelling, plastic: ratio, Vitr. 1, 1, 13: manus, plastic, Tert. ad Nat. 1, 12.
  2. II. Subst.: pla-stĭcus, i, m., a moulder, modeller, statuary (post-class.), Firm. Math. 7, 25.