# flatworm

> English word · Noun

## Definitions
1. Any of very many parasitic or free-living worms, of the phylum Platyhelminthes, having a flattened body with no skeleton or body cavity.

## Etymology
From flat + worm, a calque of translingual Platyhelminthes.

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