Source : Webster's Revised Unabridged Dictionary (1913)

Manta \Man"ta\, n. [From the native name.] (Zo["o]l.)
   See {Coleoptera} and {Sea devil}.

Source : WordNet®

manta
     n 1: a blanket that is used as a cloak or shawl
     2: extremely large pelagic tropical ray that feeds on plankton
        and small fishes; usually harmless but its size make it
        dangerous if harpooned [syn: {manta ray}, {devilfish}]