The Collaborative International Dictionary of English v.0.48:
cylindricalness \cylindricalness\ n. 1. the roundness of a 3-dimensional cylinder. Syn: cylindricality; cylindricity. [WordNet 1.5]WordNet (r) 3.0 (2006):
cylindricalness n 1: the roundness of a 3-dimensional cylinder [syn: cylindricality, cylindricalness]