1. Plural of pyknometer; instruments used to measure the density or specific gravity of liquids or solids by determining their volume and mass.
Usage: technical; scientific; also spelled pycnometer

Examples

• The laboratory technician used pyknometers to measure the density of various liquid samples.
• Pyknometers are essential tools in materials science for determining the true density of powders and solids.
• The chemistry class calibrated their pyknometers before conducting the density experiment.
• Different sizes of pyknometers are available depending on the volume of material being tested.
• Accurate results from pyknometers require careful temperature control during measurement.