Is not. See Nis. Chaucer. Spenser. [ 1913 Webster ]
‖n. [ NL., fr. Gr. &unr_; drowsiness, fr. &unr_; to nod in sleep, to slumber. ] (Med.) A rapid involuntary oscillation of the eyeballs. [ 1913 Webster ]
n. [ From NY state + -in, due to its discovery in New York State. ] An antifungal antibiotic, extracted from fermentation broths of the soil actinomycete