Actinoidea

Pronunciation: /ækˌtɪnˈɔɪdiə/

Definitions of actinoidea

noun a taxonomic group that includes sea anemones and corals, characterized by having stinging cells called nematocysts

Example Sentences

A1 Actinoidea are a group of marine animals that include sea stars and sea urchins.

A2 The actinoidea exhibit radial symmetry, with body parts arranged around a central axis.

B1 Scientists study the evolutionary relationships among different species of actinoidea.

B2 The diversity of actinoidea in the ocean ecosystem is fascinating to marine biologists.

C1 Research on the genetic makeup of actinoidea is helping to understand their ecological roles.

C2 The intricate feeding mechanisms of actinoidea demonstrate their adaptability to different environments.

Examples of actinoidea in a Sentence

formal The actinoidea are a subclass of the class Anthozoa, consisting of sea anemones and corals.

informal I saw some cool actinoidea at the aquarium today.

slang Those actinoidea creatures are really weird looking!

figurative The actinoidea sway gently in the ocean currents, like dancers in a ballet.

Grammatical Forms of actinoidea

• past tense: acted
• plural: actinoides
• comparative: more actinoidea
• superlative: most actinoidea
• present tense: actinoidea
• future tense: will actinoidea
• perfect tense: has acted
• continuous tense: is acting
• singular: actinoidea
• positive degree: actinoidea
• infinitive: to actinoidea
• gerund: acting
• participle: acting

Origin and Evolution of actinoidea

First Known Use: 1833 year

Language of Origin: Greek

Story behind the word: The word 'actinoidea' originated from the Greek words 'aktinos' meaning ray and 'eidos' meaning form or appearance.

Evolution of the word: Originally used in the field of biology to describe a group of organisms with radial symmetry, the term 'actinoidea' has since evolved to also refer to a specific taxonomic group within the animal kingdom known as the Actinioidea.