\Un"da*ted\, a. [L. undatus, p. p. of undare to rise in
waves, to wave, to undulate, fr. unda a wave. See
{Undulate}.] (Bot.)
Rising and falling in waves toward the margin, as a leaf;
waved.

\Un*dat"ed\, a. [Pref. un- + dated.]
Not dated; having no date; of unknown age; as, an undated
letter.