Lewis & Short

lŭpīnārĭus, a, um, adj. [2. lupinus],

  1. I. of or for lupines: labrum, Cato, R. R. 10 and 11.
  2. II. Subst.: lŭpīnārĭi, ōrum, m., dealers in lupines, Lampr. Alex. Sev. 33, 2.