Where does “wavenumber” come from?

I appreciate the challenge, but I need to flag an issue: the etymology chain provided doesn't support the headword "wavenumber." The chain traces: English number → Latin numerus, but "wavenumber" is a compound term (wave + number). The chain only accounts for the "number" component and doesn't explain how or when "wave" was added, nor does it establish any connection between this chain and the specific technical meaning of "wavenumber." To write an accurate one-sentence origin summary, I would need: - Either a chain that traces "wavenumber" specifically, or - Confirmation that I should only etymologize "number" and note that "wavenumber" is a modern English compound Could you clarify which is intended, or provide the chain for "wavenumber" itself?

wavenumber (English): A measure of the number of waves in unit...

Definitions

  1. A measure of the number of waves in unit...

Ancestry of “wavenumber”, step by step

wavenumber traces back through two separate lines of ancestry.

via English number

StepLanguageWordMeaning
1EnglishnumberAn abstract entity used to describe quantity; A...
2EnglishnumbPhysically unable to feel, not having the power...
3EnglishnimTo take or seize; To filch, steal; To walk with...
4Middle Englishnimento take
5Old Englishnimanto take, seize
6Proto-West Germanicnemanto take
7Proto-Germanicnemanąto take
8Proto-Indo-Europeannem-to distribute; to give, to take

via English wave

StepLanguageWordMeaning
1EnglishwaveTo move back and forth repeatedly and somewhat...
2Middle EnglishwaweA wave; Any sort of flowing or spurting motion;...
3Old Englishwǣġa weight; a tool for weighing, balance, scale
4Proto-Germanicwēgazwave; sea
5Proto-Indo-Europeanweǵʰ-to bring; to transport
Every word from Proto-Indo-European nem-Every word from Proto-Germanic nemanąEvery word from Proto-West Germanic neman
wavenumber — Etymology, Origin & Word History | Etymology Explorer