Nasal is a feature which characterizes sounds that are produced by lowering the soft palate (=velum), allowing the air to escape through the nose. (Cf. damping for the spectral consequences of involving the nasal cavity in the articulation)
English has the following nasal consonants: [n], [m], [ŋ] (cf. bang).
Nasal is the relational adjective derived from Latin nasus 'nose'.
German Nasal (de)