# glaucus

> English word · Noun · IPA /ˈɡlɔːkəs/ · frequency rank #92,648

## Definitions
1. Any member of the genus Glaucus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea, strikingly colored with blue and silvery white.
2. A desert lime (Citrus glauca), a thorny shrub species endemic to semi-arid regions of Australia.

## Etymology
Borrowed from translingual Glaucus, from Latin glaucus, from Ancient Greek γλαῦκος (glaûkos, “blue-grey fish”), from γλαυκός (glaukós, “blue-green, blue-grey”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/glaucus