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From The Collaborative International Dictionary of English v.0.48:
Jugular \Ju"gu*lar\, n. [Cf. F. jugulaire. See Jugular, a.] [1913 Webster] 1. (Anat.) One of the large veins which return the blood from the head to the heart through two chief trunks, an external and an internal, on each side of the neck; -- called also the jugular vein. [1913 Webster] 2. (Zool.) Any fish which has the ventral fins situated forward of the pectoral fins, or beneath the throat; one of a division of fishes (Jugulares). [1913 Webster]