curved

adj.
  1. not straight; having or marked by curves. Opposite of straight.
  2. (Botany) curved with the micropyle near the base almost touching its stalk; -- of a plant ovule. Opposite of orthotropous.

[Narrower terms: arced, arched, arching, arciform, arcuate, bowed; falcate, sickle-shaped; flexuous; incurvate, incurved: recurved, recurvate; semicircular: serpentine, snaky: sinuate, sinuous, wavy: sinusoidal]