The Collaborative International Dictionary of English v.0.48:

Eolis \E"o*lis\, n. [L. Aeolis a daughter of [AE]olus, Gr.
   A'ioli`s.] (Zo["o]l.)
   A genus of nudibranch mollusks having clusters of branchial
   papill[ae] along the back. See Ceratobranchia. [Written
   also [AE]olis.] Eon