văpōrālis — Lewis & Short
văpōrālis, e, adj.vapor,
I of or belonging to steam or vapor, vapory (late Lat.):
tenuitas,Aug. Genes. ad Lit. 2, 5.—Adv.: văpōrālĭter, like a vapor, Aug. Genes. ad Lit. 2, 4 fin.; 3, 10 fin.