The Collaborative International Dictionary of English v.0.48:

Circean \Cir*ce"an\, a. [L. Circaeus.]
   Having the characteristics of Circe, daughter of Sol and
   Perseis, a mythological enchantress, who first charmed her
   victims and then changed them to the forms of beasts;
   pleasing, but noxious; as, a Circean draught.
   [1913 Webster] Circensial