Words that rhyme with gretna

n 1: the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve

n 1: an inactive volcano in Sicily; last erupted in 1961; the highest volcano in Europe (10,500 feet) [syn: Etna, Mount Etna, Mt Etna] 2: a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air [syn: bunsen burner, bunsen, etna]