/ ˌekəʊləʊˈkeɪʃn; NAmE ˌekoʊloʊ-/ noun
[ U ] the use of reflected sound waves for finding things, especially by creatures such as dolphins and bats
/ ˌekəʊləʊˈkeɪʃn; NAmE ˌekoʊloʊ-/ noun
[ U ] the use of reflected sound waves for finding things, especially by creatures such as dolphins and bats
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005