Where does “медок” come from?

медок (Russian) comes from Russian мёд, from Old East Slavic медъ, from Proto-Slavic mȅdъ, from Proto-Balto-Slavic médu, from Proto-Indo-European médʰu — honey; honey wine, mead.

Ancestry of “медок”, step by step

Step	Language	Word	Meaning
1	Russian	мёд	honey; mead
2	Old East Slavic	медъ	honey
3	Proto-Slavic	mȅdъ	honey
4	Proto-Balto-Slavic	médu	honey
5	Proto-Indo-European	médʰu	honey; honey wine, mead

Every word from Proto-Indo-European médʰu →Every word from Proto-Balto-Slavic médu →Every word from Proto-Slavic mȅdъ →