ˈuvelloid,a. [f.mod.L. ūvell-a, dim. of L. ūva uva, + -oid.] Like or resembling a small cluster of grapes. 1880W. Saville-Kent Man. Infusoria I. 190 Similar, but detached, uvelloid clusters.Ibid. 191 The propagation of the species by the detachment of entire uvelloid masses.