/ haɪˈdrɒlədʒi; NAmE -ˈdrɑːl-/ noun
[ U ] ( technical ) the scientific study of the earth's water, especially its movement in relation to land
/ haɪˈdrɒlədʒi; NAmE -ˈdrɑːl-/ noun
[ U ] ( technical ) the scientific study of the earth's water, especially its movement in relation to land
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005