Where does “носовой” come from?

носовой (Russian) comes from Russian но́с, from Old East Slavic носъ, from Proto-Slavic nȍsъ, from Proto-Balto-Slavic nasús, from Proto-Indo-European néh₂s- — nose, nostril.

носовой (Russian): nose; nasal; prow, bow; forward

Definitions

nose; nasal; prow, bow; forward

Ancestry of “носовой”, step by step

Step	Language	Word	Meaning
1	Russian	но́с	nose
2	Old East Slavic	носъ	nose
3	Proto-Slavic	nȍsъ	nose
4	Proto-Balto-Slavic	nasús	nose
5	Proto-Indo-European	néh₂s-	nose, nostril

Every word from Proto-Indo-European néh₂s- →Every word from Proto-Balto-Slavic nasús →Every word from Proto-Slavic nȍsъ →