In anatomy, pertaining to the throat in general.In ichthyology: Having the ventral fins situated at the throat, in advance of the pectorals: as, a jugular fish. Cf.Situated in advance of the pectorals: as, jugular fins.In ornithology, pertaining to the jugulum.In entomology, one of the large corneous plates covering the maxillæ in certain Coleoptera.In ichthyology, one of the anterior cardinal veins, which bring back blood from the head and anterior extremities. Also called vena jugularis.n. In anatomy, a jugular vein.n. In ichthyology, a jugular fish.