noun🔗Share軽石A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into water or air as a froth containing masses of gas bubbles. As the lava solidifies, the bubbles are frozen into the rock."The geologist carefully examined the piece of pumice, noticing its light weight and many tiny holes. "地質学者は軽石の破片を注意深く調べ、その軽さと多くの小さな穴に気づいた。geologymaterialsubstancenaturescienceChat with AIVocabulary GamePractice Reading
verb🔗Share軽石で磨くTo abrade or roughen with pumice."She used a pumice stone to pumice the calluses on her feet. "彼女は軽石を使って足の角質を磨いた。materialgeologyactionChat with AIVocabulary GamePractice Reading
