noun🔗ShareHornblendaA green to black amphibole mineral, of complex structure, formed in the late stages of cooling in igneous rock."The geologist found small crystals of hornblende in the igneous rock sample collected near the school. "El geólogo encontró pequeños cristales de hornblenda en la muestra de roca ígnea recolectada cerca de la escuela.geologymineralmaterialChat with AIVocabulary GamePractice Reading