noun🔗Share부석A 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. "지질학자는 부석 조각을 조심스럽게 조사하며 가벼운 무게와 많은 작은 구멍에 주목했다.geologymaterialsubstancenaturescienceChat with AIVocabulary GamePractice Reading
verb🔗Share부석으로 문지르다To abrade or roughen with pumice."She used a pumice stone to pumice the calluses on her feet. "그녀는 발의 굳은살을 부석으로 문지르기 위해 부석을 사용했다.materialgeologyactionChat with AIVocabulary GamePractice Reading
