Where does “яйцеклетка” come from?

яйцеклетка (Russian) comes from Russian яйцо́, from Old East Slavic ꙗице, from Proto-Slavic ajьce, from Proto-Slavic ȃje, from Proto-Balto-Slavic *ṓjan, from Proto-Indo-European h₂ōwyóm, from Proto-Indo-European h₂éwis — bird.

яйцеклетка (Russian): ovum, egg; ovule

Definitions

  1. ovum, egg; ovule

Ancestry of “яйцеклетка”, step by step

яйцеклетка traces back through two separate lines of ancestry.

via Russian яйцо́

StepLanguageWordMeaning
1Russianяйцо́egg
2Old East Slavicꙗицеegg
3Proto-Slavicajьceegg
4Proto-Slavicȃjeegg amniote embryo with protective shell
5Proto-Balto-Slavic*ṓjanegg
6Proto-Indo-Europeanh₂ōwyómegg
7Proto-Indo-Europeanh₂éwisbird

via Russian кле́тка

StepLanguageWordMeaning
1Russianкле́ткаcage, coop, cell
2Old East Slavicклѣтъкаcage, coop, cell
3Proto-Slavicklětъkacage, coop, cell
4Proto-Slavicklětьthe commonality in all the descendants, including some derived terms (closet, hut, cabin, cage, granary, cellar, barn), is that of a 'closed space'
5Proto-Balto-Slavicklḗˀtis
Every word from Proto-Indo-European h₂éwisEvery word from Proto-Indo-European h₂ōwyómEvery word from Proto-Balto-Slavic *ṓjan