hy·droid
ˈhī-ˌdrȯid 
Examples of hydroid in a Sentence
Recent Examples on the Web
New York Times, 11 Mar. 2022
Coastal podded hydroid Aglaophenia pluma, open-ocean Planes crab and open-ocean Lepas gooseneck barnacles colonize a piece of floating debris.
—NBC News, 3 Dec. 2021
Ashley MacKin Solomon, Mercury News, 24 July 2025
Off the east coast of China, researchers discovered an unusual spiky creature feeding on a jellyfish-like species called a hydroid.
—Lauren Liebhaber, Miami Herald, 18 June 2025
By-the-wind-sailors are related to anemones, corals, jellyfish and hydroids.
—Adrian Rodriguez, Mercury News, 4 Apr. 2025
The crab had camouflaged and armed itself with tiny hydroids known as Tubularia.
—Cecilia Rodriguez, Forbes, 26 Nov. 2024
The first three all originate in the Far East, while Bengals are a hydroid cross between cats and Asian leopard cats.
—Jennifer Ouellette, Ars Technica, 4 Sep. 2024
Polyps are part of the life cycle of jellyfish and the related group of animals known as hydroids.
—Aspen Pflughoeft, Miami Herald, 20 Feb. 2024
Common coastal stowaways included amphipods, isopods, hydroids and bryozoans, most of which originated from the northwest Pacific.
—Tim Brinkhof, Discover Magazine, 25 Nov. 2023
The rock was also lined with wispy filaments, perhaps a component of the bacterial mats, or perhaps a peculiar animal known as a hydroid.
—Matt Simon, Wired, 15 Feb. 2021
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Adjective
Scientists are divided over whether a creature sitting near the wheel — which resembles an ostrich feather crossed with a Christmas tree — is a hydroid or a black coral.
—New York Times, 11 Mar. 2022
Coastal podded hydroid Aglaophenia pluma, open-ocean Planes crab and open-ocean Lepas gooseneck barnacles colonize a piece of floating debris.
—NBC News, 3 Dec. 2021
Noun
Some believe — though it has not been confirmed — that the hydroid helps the bean clam ward off predators.
—Ashley MacKin Solomon, Mercury News, 24 July 2025
Off the east coast of China, researchers discovered an unusual spiky creature feeding on a jellyfish-like species called a hydroid.
—Lauren Liebhaber, Miami Herald, 18 June 2025
By-the-wind-sailors are related to anemones, corals, jellyfish and hydroids.
—Adrian Rodriguez, Mercury News, 4 Apr. 2025
The crab had camouflaged and armed itself with tiny hydroids known as Tubularia.
—Cecilia Rodriguez, Forbes, 26 Nov. 2024
The first three all originate in the Far East, while Bengals are a hydroid cross between cats and Asian leopard cats.
—Jennifer Ouellette, Ars Technica, 4 Sep. 2024
Polyps are part of the life cycle of jellyfish and the related group of animals known as hydroids.
—Aspen Pflughoeft, Miami Herald, 20 Feb. 2024
Common coastal stowaways included amphipods, isopods, hydroids and bryozoans, most of which originated from the northwest Pacific.
—Tim Brinkhof, Discover Magazine, 25 Nov. 2023
The rock was also lined with wispy filaments, perhaps a component of the bacterial mats, or perhaps a peculiar animal known as a hydroid.
—Matt Simon, Wired, 15 Feb. 2021
Cite this Entry
“Hydroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydroid. Accessed 30 Jul. 2025.
Copy CitationKids Definition
hydroid
1 of 2 adjective
hy·droid
ˈhī-ˌdrȯid
: of or relating to the hydrozoans
especially
: resembling a hydra
hydroid
2 of 2 noun
: hydrozoan
especially
: a hydrozoan polyp in contrast to a hydrozoan jellyfish
Medical Definition
hydroid
1 of 2 adjective
hy·droid
ˈhī-ˌdrȯid
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