VirgularianVir`gu*la"ri*an\, n. [From. L. virgula a small rod.] (Zo["o]l.) Any one of numerous species of long, slender Alcyonaria belonging to Virgularia and allied genera of the family Virgularid[ae]. These corals are allied to the sea-pens, but have a long rodlike rhachis inclosing a slender, round or square, calcareous axis. The polyps are arranged in transverse rows or clusters along each side of the rhachis.