Definition of Asteroidea in English:

Asteroidea

plural nounˌastəˈrɔɪdɪəˌastəˈroidēə

Zoology

A class of echinoderms that comprises the starfishes.
Example sentencesExamples
- Members of the Asteroidea are often called ‘true starfish’ and are closely related to the Ophiuroidea, having a common ancestor in the Ordovician.
- A traditional hypothesis of the Echinodermata using only extant taxonomic groups places the Asteroidea and Ophiuroidea as sister groups based on the shared derived characteristic of a five-rayed body plan.
- Together, the two ancient fossils demonstrate that the class Asteroidea was established by early in the Ordovician.
- The body outline is similar to the Asteroidea, in that they have five arms joined to a central disk (calyx).
- The phylogeny and taxonomy of the Asteroidea led Gregory to begin his paper with a note of frustration: ‘The classification of the Palaeozoic starfishes has long been in chaos.’
- True starfish are classified in the Asteroidea, a group of echinoderms.

Origin

Modern Latin (plural), from Greek asteroeidēs 'starlike', from astēr 'star'.

Definition of Asteroidea in US English:

Asteroidea

plural nounˌastəˈroidēə

Zoology

A class of echinoderms that comprises the starfishes.
Example sentencesExamples
- True starfish are classified in the Asteroidea, a group of echinoderms.
- Together, the two ancient fossils demonstrate that the class Asteroidea was established by early in the Ordovician.
- The body outline is similar to the Asteroidea, in that they have five arms joined to a central disk (calyx).
- Members of the Asteroidea are often called ‘true starfish’ and are closely related to the Ophiuroidea, having a common ancestor in the Ordovician.
- A traditional hypothesis of the Echinodermata using only extant taxonomic groups places the Asteroidea and Ophiuroidea as sister groups based on the shared derived characteristic of a five-rayed body plan.
- The phylogeny and taxonomy of the Asteroidea led Gregory to begin his paper with a note of frustration: ‘The classification of the Palaeozoic starfishes has long been in chaos.’

Origin

Modern Latin (plural), from Greek asteroeidēs ‘starlike’, from astēr ‘star’.

单词	Asteroidea
释义	Definition of Asteroidea in English: Asteroidea plural nounˌastəˈrɔɪdɪəˌastəˈroidēə Zoology A class of echinoderms that comprises the starfishes. Example sentencesExamples Members of the Asteroidea are often called ‘true starfish’ and are closely related to the Ophiuroidea, having a common ancestor in the Ordovician. A traditional hypothesis of the Echinodermata using only extant taxonomic groups places the Asteroidea and Ophiuroidea as sister groups based on the shared derived characteristic of a five-rayed body plan. Together, the two ancient fossils demonstrate that the class Asteroidea was established by early in the Ordovician. The body outline is similar to the Asteroidea, in that they have five arms joined to a central disk (calyx). The phylogeny and taxonomy of the Asteroidea led Gregory to begin his paper with a note of frustration: ‘The classification of the Palaeozoic starfishes has long been in chaos.’ True starfish are classified in the Asteroidea, a group of echinoderms. Origin Modern Latin (plural), from Greek asteroeidēs 'starlike', from astēr 'star'. Definition of Asteroidea in US English: Asteroidea plural nounˌastəˈroidēə Zoology A class of echinoderms that comprises the starfishes. Example sentencesExamples True starfish are classified in the Asteroidea, a group of echinoderms. Together, the two ancient fossils demonstrate that the class Asteroidea was established by early in the Ordovician. The body outline is similar to the Asteroidea, in that they have five arms joined to a central disk (calyx). Members of the Asteroidea are often called ‘true starfish’ and are closely related to the Ophiuroidea, having a common ancestor in the Ordovician. A traditional hypothesis of the Echinodermata using only extant taxonomic groups places the Asteroidea and Ophiuroidea as sister groups based on the shared derived characteristic of a five-rayed body plan. The phylogeny and taxonomy of the Asteroidea led Gregory to begin his paper with a note of frustration: ‘The classification of the Palaeozoic starfishes has long been in chaos.’ Origin Modern Latin (plural), from Greek asteroeidēs ‘starlike’, from astēr ‘star’.
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