/ ˌkɜːvɪˈlɪniə(r); NAmE ˌkɜːrv-/ adjective
( formal ) consisting of a curved line or lines
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WORD ORIGIN
early 18th cent.: from Latin curvus bent, curved, on the pattern of rectilinear .
CURVILINEAR
Meaning of CURVILINEAR in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005