pyroclastiqueadjectiveSyllable DecompositionpyroclastiqueEtymologyexpandcompound word of pyroclast and -ic.Definitions1. Broken by fire, a wave of lava from a volcano in eruption.expandLa lave descend en coulées pyroclastiques.2. Concerning a certain form of landslide, often created by volcanic eruptions.géologieexpandCoulée pyroclastique.PluralpyroclastiquesSee alsopyroclastiques (adj.)