Definition of pinacol in US English:

pinacol

noun

Chemistry
  • An alcohol having two hydroxyl groups bonded to adjacent tertiary carbon atoms; specifically the simplest alcohol of this kind, 1,4-dimethylpropan-2,3-diol (also called tetramethyl ethylene glycol), (CH₃)₂(OH)C—C(OH)(CH₃)₂, a crystalline solid made by reducing acetone with magnesium amalgam.

Origin

Early 20th century; earliest use found in Chemical Abstracts. From pinac- + -ol.

Pronunciation

pinacol

/ˈpɪnəkɒl/