noun
a piece of thick string with a weight attached to one end, used to find the depth of water or to test whether a wall, etc. is straight
noun
a piece of thick string with a weight attached to one end, used to find the depth of water or to test whether a wall, etc. is straight
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005