Undated
Undated (un"da*ted) , adjective
[Latin undatus, past participle of undare to rise in waves, to wave, to undulate, from unda a wave. See Undulate.]
(Botany) Rising and falling in waves toward the margin, as a leaf; waved.
Undated (un*dāt"ed) , adjective
[Prefix un- not + dated.]
Not dated; having no date; of unknown age; as, an undated letter.