Siskin \Sis"kin\, n. [Dan. sisgen; cf. Sw. siska, G. zeisig, D. sijsje; of Slav. origin; cf. Pol. czy?.]

(Zo["o]l.)
   (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.

Source: Webster's Revised Unabridged Dictionary (1913)