# femtoplankton

> English word · Noun

## Definitions
1. The plankton composed of cells smaller than 0.2 micrometers.

## Etymology
From femto- + plankton.

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