# mesoptile

> English word · Noun

## Definitions
1. one of the second set of down feathers (in those birds that have two sets)

## Etymology
From meso- + -ptile.

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