Seagrass
ahd-5
noun.
Any of various submersed marine grasslike plants that grow in shallow coastal waters.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
Any of various
grass
-like
marine
plants that grow underwater in salt water.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
any of various seaweeds that grow underwater in shallow beds
Word Usage
"They also provide ecological support for other ecosystems such as seagrass beds and mangroves."
Hypernym
Words that are more generic or abstract
seaweed