atroposcommon nounproper nounSyllable DecompositionatroposEtymologyexpandfrom ancient Greek, 'who no longer turns', because the spindle held by Lachesis no longer turned when the thread was cutDefinitions1. Among the three Fates, the one whose duty is to cut the thread of human life.mythologieexpand2. A rather beautiful moth also called the death's-head hawkmoth.zoologieexpand