nāpy — Lewis & Short
nāpy, ўŏs, n., = na=pu (an old form for si/napi),
I mustard:
sinapi Athenienses napy appellaverunt,Plin. 19, 8, 54, § 171:
alterum thlaspi aliqui Persicum napy appellaverunt,id. 27, 13, 113, § 140.