ser·in (sěr'ĭn) n. Any of several Old World finches of the genus Serinus having yellowish plumage, especially a European species (S. serinus) closely related to the canary.
[French, from Old French, perhaps from Old Provençal serena, a kind of bird, from Late Latin sīrēna, from Latin sīrēn, from Greek seirēn.]