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Cnidarian Meaning: Definition, Examples, and Translations

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cnidarian

[ˈnɪdɛˌrɪən ]

Definition

Context #1 | Noun

marine animal

Cnidarians are a group of invertebrate animals that include jellyfish, corals, and sea anemones. They are characterized by their radial symmetry and specialized stinging cells called cnidocytes.

Synonyms

coral, jellyfish, sea anemone.

Which Synonym Should You Choose?

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Word Description / Examples
cnidarian

Use this scientific term when discussing the phylum of marine animals that include corals, jellyfish, and sea anemones. It is typically used in academic or educational contexts.

  • Cnidarians have specialized cells known as cnidocytes.
  • Marine biologists study cnidarians to understand their unique biology.
jellyfish

Use this word when referring to the gelatinous, free-swimming member of the cnidarian phylum. Commonly mentioned in casual conversations, beach activities, or when discussing marine life.

  • Watch out for jellyfish when swimming in the ocean.
  • Jellyfish blooms are becoming more frequent due to changing ocean conditions.
coral

Best used when talking about marine invertebrates that form colonies and build reefs. Often mentioned in ecological, environmental, or diving contexts.

  • The Great Barrier Reef is made up of millions of tiny corals.
  • Climate change is having a devastating effect on coral reefs.
sea anemone

This term is appropriate for discussing the often colorful, flower-like marine animals that attach to surfaces in the ocean. Frequently used in marine biology or while describing marine life in tide pools.

  • Clownfish have a symbiotic relationship with sea anemones.
  • Sea anemones use their tentacles to catch prey.

Examples of usage

  • Jellyfish are a common type of cnidarian found in oceans around the world.
  • Corals, another type of cnidarian, form intricate reef structures in tropical waters.
  • Sea anemones, also cnidarians, are known for their colorful appearance and symbiotic relationships with clownfish.

Translations

To see the translation, please select a language from the options available.

Interesting Facts

Biology

  • Cnidarians have specialized cells called cnidocytes that contain stinging structures, used for capturing prey and self-defense.
  • They possess a simple body structure, with no complex organs; instead, they have a gelatinous layer called mesoglea.
  • Common examples include jellyfish, sea anemones, and corals, all showcasing different body forms (medusa and polyp).

Ecology

  • Coral reefs, formed by cnidarians, are vital ecosystems, providing habitat for many marine species.
  • These organisms play a key role in ocean food webs, often serving as both predator and prey.

Cultural Significance

  • In various cultures, jellyfish are featured in art and folklore, symbolizing grace and danger.
  • The well-known gelatin dessert 'jelly' is named after the jelly-like texture of these creatures.

Research

  • Scientists study cnidarians to understand basic biological processes and evolutionary relationships due to their simple structure.
  • Some species exhibit regeneration, meaning they can regrow parts of their bodies, making them a topic of interest in regeneration studies.

Origin of 'cnidarian'

Main points about word origin

  • The word 'cnidarian' comes from the Greek word 'knidÄ“', meaning 'nettle', referring to their stinging cells.
  • It was first used in scientific literature in the 1900s as biologists began to classify these unique creatures.

The term 'cnidarian' is derived from the Greek word 'cnidos,' which means 'stinging nettle.' Cnidarians have a long evolutionary history, with fossils dating back over 500 million years. They play important roles in marine ecosystems and have diverse forms and adaptations.

Word Frequency Rank

At position #41,235, this word is among the less frequently used terms in English. While interesting to know, it's not crucial for most English learners unless needed for specific purposes.