# sevenless

> English word · Noun

## Definitions
1. A gene in Drosophila melanogaster that encodes a receptor tyrosine kinase protein essential to the development of R7 cells in the embryonic eye.

## Etymology
From seven + -less.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sevenless