gbl

/G B AH0 L/
noun
  1. 1

    (uncountable) Initialism of gamma-butyrolactone. [(chemistry, pharmacology) The lactone of 4-hydroxybutyric acid; A colourless liquid used as a solvent or reagent in various industrial uses, as well as a recreational drug.]

  2. 2

    (semiconductor industry) Initialism of graded buffer layer.