Hylodes \Hy*lo"des\, n. [NL., fr. Gr. ? woody, wooded, muddy; ? a wood + ? form.] (Zo["o]l.) The piping frog ({Hyla Pickeringii}), a small American tree frog, which in early spring, while breeding in swamps and ditches, sings with high, shrill, but musical, notes.