GNU Collaborative International Dictionary of English

Found one definition

1.       
   ‖Anta (), n.; pl. Antæ (). [L.] (Arch.) A species of pier produced by thickening a wall at its termination, treated architecturally as a pilaster, with capital and base.
   
   [1913 Webster]
   
   ☞ Porches, when columns stand between two antæ, are called in Latin in antis.
   
   [1913 Webster]