order Cetacea

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Definition

Noun: - A taxonomic order of marine mammals: "Order Cetacea" is the scientific classification for a group of fully aquatic, mostly marine mammals. This order includes whales, dolphins, and porpoises. Members of this order are characterized by streamlined bodies, forelimbs modified into flippers, vestigial hind limbs, and a tail with horizontal flukes used for propulsion.

Usage Examples
  • Noun:
    • The blue whale, the largest animal on Earth, belongs to the order Cetacea.
    • Marine biologists study the evolution and behavior of species within the order Cetacea.
Advanced Usage
  • In scientific taxonomy: The term is used in biological classification to group related families. It is often subdivided into two suborders: Mysticeti (baleen whales) and Odontoceti (toothed whales, dolphins, and porpoises).
    • The order Cetacea falls under the infraclass Cetartiodactyla, which also includes even-toed ungulates like hippopotamuses.
Variants and Related Words
  • Cetacean (n/adj): A member of the order Cetacea; relating to this order.
    • Cetacean populations are affected by ocean noise pollution.
  • Cetology (n): The branch of zoology that deals with whales and dolphins (cetaceans).
Synonyms
  • Whales and dolphins (common, non-scientific grouping).
  • Cetaceans (scientific term for members of the order).
Related Phrases
  • Cetacean research: Scientific study focused on whales, dolphins, and porpoises.
    • The institute is renowned for its cetacean research.
  • Cetacean conservation: Efforts to protect whales, dolphins, and porpoises.
    • International agreements are crucial for cetacean conservation.
Noun
  1. an order of Eutheria

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