noun
[ U ] ( geology ) the movements of the large sheets of rock (called plates ) that form the earth's surface; the scientific study of these movements
noun
[ U ] ( geology ) the movements of the large sheets of rock (called plates ) that form the earth's surface; the scientific study of these movements
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005