pyc·nom·e·ter noun alsopic·nom·e·terorpyk·nom·e·ter\pikˈnäməd.ə(r)\ Etymology: International Scientific Vocabulary pycn- + -meter : a standard vessel often provided with a thermometer for measuring and comparing the densities of liquids or solids • pyc·no·met·ric\|piknə|me.trik\adjective • pyc·nom·e·try\pikˈnämə.trē\noun-es