The Collaborative International Dictionary of English v.0.48:

Hellespont \Hel"les*pont\, n. [L. Hellespontus, Gr. ?; ? the
   mythological Helle, daughter of Athamas + ? sea.]
   A narrow strait between Europe and Asia, now called the
   Daradanelles. It connects the Aegean Sea and the sea of
   Marmora.
   [1913 Webster]