Definition of picoline in US English:

picoline

(also picolin)

noun

Chemistry
  • Each of three colourless, pungent-smelling, liquid bases, (CH₃)C₅H₄N, that are isomeric methyl derivatives of pyridine and are obtained from coal tar, bone oil, etc.; specifically the α-isomer (2-methylpyridine).

Origin

Mid 19th century. From classical Latin pic-, pix pitch + -ol + -ine. Compare German Picolin.

Pronunciation

picoline

/ˈpɪkəliːn/