polian
/ˈpəʊlɪən/Zoology
adjective
Designating each of the sacs or tubes connected with the circular vessel of the water-vascular system in many echinoderms. Chiefly in Polian vesicle.
Origin
Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From the name of Giuseppe Saverio Poli, Neapolitan doctor and naturalist + -an.