sinuation

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sin·u·ate

S0431700 (sĭn′yo͞o-ĭt, -āt′)adj. Having a wavy indented margin, as a leaf.intr.v. sin·u·at·ed, sin·u·at·ing, sin·u·ates To bend or curve; wind in and out.
[Latin sinuāre, sinuāt-, to bend, from sinus, curve.]
sin′u·ate·ly adv.sin′u·a′tion n.