Entry 2 senses · 2 variants Webster, 1913 Tubularian /t(y)o͞o′byə-lər′ē-ən/ · Tu·bu·la·ri·an · IPA /ˌt(j)u.bjəˈləɹ.i.ən/ n. a. 01 n. Any hydroid belonging to the suborder Tubularida. 1. Any hydroid belonging to the suborder Tubularida.(Zool.) 02 a. Of or pertaining to the tubularians. 1. Of or pertaining to the tubularians.(Zool.)