Source : Webster's Revised Unabridged Dictionary (1913)

Columbo \Co*lum"bo\, n. (Med.)
   See {Calumba}.

Source : WordNet®

columbo
     n : any of various tall perennial herbs constituting the genus
         Frasera; widely distributed in warm dry upland areas of
         California, Oregon, and Washington [syn: {American
         columbo}, {deer's-ear}, {deer's-ears}, {pyramid plant}, {American
         gentian}]