Low coastal grassland frequently overflowed by the tide. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "salt marsh" in a sentence
"When the level prairie merged into low rolling hills, dotted with fescue and feather grass and red with the richness of iron ore -- the red ochre making it hallowed ground -- Brun knew the salt marsh was not far beyond."