| 释义 |
Definition of hydroid in English: hydroidnoun ˈhʌɪdrɔɪdˈhīdroid Zoology A coelenterate of an order which includes the hydras. They are distinguished by the dominance of the polyp phase. Order Hydroida, class Hydrozoa Example sentencesExamples - There were dense walls of soft corals, sponges, anemones and hydroids, nudibranchs, creepy-crawlies and lots of fish.
- The most numerous inhabitants are hydroids and copepods.
- Aside from its temporary and permanently resident fish, the underside is decorated with sponges, hydroids, tunicates, tube worms, cup corals and anemones.
- Colonies may be mistaken for hydroids, corals, or even seaweeds.
- On the walls are a riot of soft corals, sponges, hydroids and anemones in all shapes and sizes.
adjective ˈhʌɪdrɔɪdˈhīdroid Zoology 1Relating to coelenterates of the hydroid group. Example sentencesExamples - Before long, similar green proteins were detected in many bioluminescent coelenterates including various medusae, apparently all luminescent hydroid polyps, and a few others.
- He had shown that hydroid jellyfish known as naked-eyed medusae reproduce not only by spewing eggs, but also by asexual budding, which he found marvelous to behold.
- The hydroid tissues, in particular, are the general run of moss water storage cells and are probably only remotely related to the xylem of tracheophytes.
- Along the tops of the walls and gullies are many small hydroid clumps which, in turn, attract a range of delicately coloured nudibranchs that feed on them.
- 1.1
another term for polypoid (sense 1)
Origin Mid 19th century: from hydra + -oid. Definition of hydroid in US English: hydroidnounˈhīdroid Zoology A coelenterate of an order which includes the hydras. They are distinguished by the dominance of the polyp phase. Order Hydroida, class Hydrozoa Example sentencesExamples - Colonies may be mistaken for hydroids, corals, or even seaweeds.
- Aside from its temporary and permanently resident fish, the underside is decorated with sponges, hydroids, tunicates, tube worms, cup corals and anemones.
- There were dense walls of soft corals, sponges, anemones and hydroids, nudibranchs, creepy-crawlies and lots of fish.
- The most numerous inhabitants are hydroids and copepods.
- On the walls are a riot of soft corals, sponges, hydroids and anemones in all shapes and sizes.
adjectiveˈhīdroid Zoology 1Relating to coelenterates of the hydroid group. Example sentencesExamples - He had shown that hydroid jellyfish known as naked-eyed medusae reproduce not only by spewing eggs, but also by asexual budding, which he found marvelous to behold.
- Before long, similar green proteins were detected in many bioluminescent coelenterates including various medusae, apparently all luminescent hydroid polyps, and a few others.
- Along the tops of the walls and gullies are many small hydroid clumps which, in turn, attract a range of delicately coloured nudibranchs that feed on them.
- The hydroid tissues, in particular, are the general run of moss water storage cells and are probably only remotely related to the xylem of tracheophytes.
- 1.1
another term for polypoid (sense 1)
Origin Mid 19th century: from hydra + -oid. |