Dictionary.com
Thesaurus.com

nannoplankton

American  
[nan-uh-plangk-tuhn] / ˌnæn əˈplæŋk tən /
Also nanoplankton

noun

  1. the smallest of the microplankton; the aquatic organisms that can pass through fine mesh plankton nets.

nannoplankton Scientific  
/ năn′ə-plăngk′tən /

  1. Plankton of minute size, especially plankton composed of organisms measuring from 2 to 20 micrometers.

Etymology

Origin of nannoplankton

1910–15; nanno- ( def. ) + plankton

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.