a silvery-white, hard, brittle, very heavy metallic element of the platinum group and group VIII that occurs usually as a native alloy with platinum or with osmium in iridosmine, keemiline element, plaatinametall, hõbevalge rabe ja väga kõva metall, sulamistemperatuur 2446 ºC, tihedus 22,65 Mg/m3

additional qualification gained from a course of training for instrument flying, pädevus, mis annab piloodile õiguse sooritada instrumentaallendu ja lennata instrumentaallennu tingimustes