Source : Webster's Revised Unabridged Dictionary (1913)

Luteic \Lu*te"ic\, a. (Chem.)
   (a) Pertaining to, or derived from, weld ({Reseda luteola}).
   (b) Pertaining to, or designating, an acid resembling
       luteolin, but obtained from the flowers of {Euphorbia
       cyparissias}.