The Collaborative International Dictionary of English v.0.48:
Volumetrical \Vol`u*met"ric*al\, a. Volumetric. -- Vol`u*met"ric*al*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
volumetrical adj 1: of or relating to measurement by volume; "volumetric analysis" [syn: volumetric, volumetrical]