GNU Collaborative International Dictionary of English

Found one definition

1.       
   Vocable , n. [L. vocabulum an appellation, designation, name, fr. vocare to call, fr. vox, vocis, a voice, a word: cf. F. vocable.  See Voice.] A word; a term; a name; specifically, a word considered as composed of certain sounds or letters, without regard to its meaning.
   1913 Webster
   Swamped near to drowning in a tide of ingenious vocables.
   Carlyle.
   
   1913 Webster