adjective
[ only before noun ] using a piece of machinery in which a moving cog (= wheel with teeth around the edge) fits into a bar with teeth
adjective
[ only before noun ] using a piece of machinery in which a moving cog (= wheel with teeth around the edge) fits into a bar with teeth
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005