The Collaborative International Dictionary of English v.0.48:
Cannular \Can"nu*lar\, a. Having the form of a tube; tubular. [Written also canular.] [1913 Webster]WordNet (r) 3.0 (2006):
cannular adj 1: constituting a tube; having hollow tubes (as for the passage of fluids) [syn: tubular, cannular, tubelike, tube-shaped, vasiform]