Where does “sevenless” come from?

sevenless (English) comes from English seven, from Middle English seven, from Old English seofon, from Proto-West Germanic sebun, from Proto-Germanic sebun, from Proto-Germanic sebunt, from Proto-Indo-European septḿ̥ — seven.

sevenless (English): A gene in "Drosophila melanogaster" that encodes...

Definitions

  1. A gene in "Drosophila melanogaster" that encodes...

Ancestry of “sevenless”, step by step

sevenless traces back through two separate lines of ancestry.

via English seven

StepLanguageWordMeaning
1EnglishsevenA numerical value equal to 7; the number...
2Middle Englishsevenseven; Alternative form of sweven
3Old Englishseofonseven
4Proto-West Germanicsebunseven
5Proto-Germanicsebunseven
6Proto-Germanicsebunt—
7Proto-Indo-Europeanseptḿ̥seven

via English less

StepLanguageWordMeaning
1EnglishlessTo a smaller extent or degree; comparative form...
2Middle Englishlesfalse; lying; deceptive; falsehood; a lie
3Old Englishlēasfalse, lax; false, void, loose; devoid of, loose...
4Proto-Germanic*laus—
Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Germanic sebunt →Every word from Proto-Germanic sebun →