1. Plural of picolin; any of three isomeric methylpyridines (C₆H₇N) used as solvents and in organic synthesis.
Usage: chemistry; technical

Examples

• The laboratory used picolins as solvents in the extraction process.
• Different picolins have distinct boiling points and chemical properties.
• Picolins are important intermediates in the manufacture of pharmaceuticals.
• The three isomers of picolins are ortho-, meta-, and para-picolin.