The Collaborative International Dictionary of English v.0.48:
Cometary \Com"et*a*ry\, a. [Cf. F. com['e]taire.] Pertaining to, or resembling, a comet. --Cheyne. [1913 Webster] Comet-finderWordNet (r) 3.0 (2006):
cometary adj 1: of or relating to or resembling a comet [syn: cometary, cometic]