from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Strait; channel.

from the GNU version of the Collaborative International Dictionary of English

  • n. A strait, or arm of the sea.

from The Century Dictionary and Cyclopedia

  • n. In embryology, a constriction in the embryonic heart between the ventricle and the bulbus arteriosus.


From Latin fretum ("strait, channel") (Wiktionary)


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