1. Existing in fancy only
   - fantastic 
2. Ludicrously odd
   - antic [archaic], fantastic, grotesque

See also: fantasy, strange, unreal, unusual

• genus Teredo
• genus Termes
• genus Terrapene
• genus Terrietia
• genus Testudo
• genus Tethus
• genus Tetraclinis
• genus Tetragonia
• genus Tetragonurus
• genus Tetrahymena
• genus Tetraneuris
• genus Tetrao
• genus Tetrapturus
• genus Teucrium
• genus Thalarctos
• genus Thalassoma
• genus Thalictrum
• unfathomable
• unfathomably
• unfathomed
• unfattened
• unfavorable
• unfavorable judgment
• unfavorable position
• unfavorableness