rectilinear

From post-Classical Latin; either from rectilīneāris or from rectilīneus (whence rectiline) + -ar, in both cases ultimately deriving from rectus (“straight”) + līnea (“line”).

• (General American) IPA^(key): /ˌɹɛktɪˈlɪniɚ/
• (Received Pronunciation) IPA^(key): /ˌɹɛktɪˈlɪnɪə/
• Hyphenation: rec‧ti‧lin‧ear

• Audio (Southern England):

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rectilinear (comparative more rectilinear, superlative most rectilinear)

1. In a straight line.

   The crankshaft and connecting rods of an engine convert the rectilinear motion of the pistons to rotary motion of the flywheel.

2. (geometry, art) Formed from straight lines.

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “rectilinear”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “rectilinear”, in OneLook Dictionary Search.