a. [ L. sinuatus, p. p. of sinuare to wind, bend, fr. sinus a bend. ] Having the margin alternately curved inward and outward; having rounded lobes separated by rounded sinuses; sinuous; wavy. [ 1913 Webster ]
v. i.
a. Same as Sinuate. [ 1913 Webster ]
n. [ L. sinuatio. ] A winding or bending in and out. [ 1913 Webster ]
a. Sinuous. Loudon. [ 1913 Webster ]
n.;
A line of coast certainly amounting, with its sinuosities, to more than 700 miles. Sydney Smith. [ 1913 Webster ]
a. [ L. sinuosus, fr. sinus a bent surface, a curve: cf. F. sinueux. See Sinus. ] Bending in and out; of a serpentine or undulating form; winding; crooked. --
Streaking the ground with sinuous trace. Milton. [1913 Webster]
Gardens bright with sinuous rills. Coleridge. [1913 Webster]
a. (Zool.) Having a pallial sinus. See under Sinus. [ 1913 Webster ]
n.;
☞ A sinus may be rounded, as in the leaf of the white oak, or acute, as in that of the red maple. [ 1913 Webster ]
Pallial sinus. (Zool.)
Sinus venosus [ L., venous dilatation. ] (Anat.)
n. [ Sinus + -oid. ] (Geom.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being