freshwater

or fresh-wa·ter

[fresh-waw-ter, -wot-er]
adjective
  1. of or living in water that is fresh or not salt: freshwater fish.
  2. accustomed to fresh water only, and not to the sea: a freshwater sailor.
  3. small, provincial, or little known: a freshwater college.
  4. Obsolete. untrained or of little experience.

Origin of freshwater

First recorded in 1520–30; fresh + water
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for freshwater

freshwater

noun (modifier)
  1. of, relating to, or living in fresh water
  2. (esp of a sailor who has not sailed on the sea) unskilled or inexperienced
  3. US small and little knowna freshwater school
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for freshwater
adj.

also fresh water, 1520s, from fresh (adj.1) + water (n.1).

Online Etymology Dictionary, © 2010 Douglas Harper

freshwater in Science

freshwater

[frĕshwô′tər]
  1. Consisting of or living in water that is not salty.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.