# castellanus

> English word · Noun · IPA /ˌkæstəˈlɑːnəs/

## Definitions
1. A cloud species which shows vertical formations giving a crenellated appearance, associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.
2. Alternative form of castellan.

## Etymology
From New Latin castellānus, from Medieval Latin castellum (“castle, fortress”) + -ānus (“-an: forming adj.”), from castrum (“fort”) + -ellum (“-elle: forming diminutives”). Doublet of Castilian, castellano, castellan, and chatelain.

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