pumiciform,a.rare.|ˈpjuːmɪsɪfɔːm| [ad.mod.L. pūmiciform-is, f. L. pūmex, -icem: see -form.] Having the form, appearance, or texture of pumice. 1858Mayne Expos.Lex., Pumiciformis, Geol. resembling pumice stone in appearance, as the Lava pumiciformis: pumiciform.