What does "siskin" mean?

Siskin: (a) A small green and yellow European finch (Spinus spinus, or Carduelis spinus); -- called also aberdevine. (b) The American pinefinch (S. pinus); -- called also pine siskin. See Pinefinch. Note: The name is applied also to several other related species found in Asia and South America. Siskin green, a delicate shade of yellowish green, as in the mineral torbernite.