D defs.my
Entry 1 sense Webster, 1913

Pycnometer

· Pyc·nom·e·ter · IPA /pɪkˈnɒmɪtə(ɹ)/
01 n. A specific gravity bottle; a standard flask for measuring and comparing the densities of liquids.
  1. 1.
    A specific gravity bottle; a standard flask for measuring and comparing the densities of liquids.(Physics)