curvilinear


Concise Oxford English Dictionary © 2008 Oxford University Press:
curvilinear /ˌkəːvɪˈlɪnɪə/
adjective contained by or consisting of a curved line or lines.
– derivatives
curvilinearly adverb.
– origin C18: from L. curvus ‘bent, curved’, on the pattern of rectilinear.
'curvilinear' also found in these Oxford entries:

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