An Etymological Dictionary of Astronomy and Astrophysics

A → WN Wolf-Rayet star whose spectrum shows the following emission line characteristics: N IV 3479-3484, 4058 Å about N V 3479-3484, 4058 Å and N III 4634-4641, 5314 Å
weak or absent.

See also: W, from → Wolf-Rayet; N, from → nitrogen; → star.