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单词 Oligochaeta
释义

Definition of Oligochaeta in English:

Oligochaeta

plural nounˌɒlɪɡə(ʊ)ˈkiːtəˌäliɡōˈkēdə
Zoology
  • A class of annelid worms which includes the earthworms. They have simple setae projecting from each segment and a small head lacking sensory appendages.

    〔动〕寡毛纲

    Example sentencesExamples
    • The phylum Annelida is traditionally divided into three classes: Oligochaeta, Hirudinida, and Polychaeta (marine annelids).
    • Annelids with a clitellum (a swelling towards the head of the animal, where the gonads are located) are classified in the Clitellata, which is further divided into Hirudinea and Oligochaeta (including the earthworms).
    • In traditional classification schemes, the Annelida consists of the Polychaeta and the Clitellata (the latter including the Oligochaeta and Hirudinida).
    • Stewart affectionately describes him as an elderly man - ‘a dabbler, a homebody’ - pottering about observing members of the taxonomic class Oligochaeta as they went about their business.

Origin

Modern Latin (plural), from oligo- 'few' + Greek khaitē 'long hair' (taken to mean 'bristle'), because they have fewer setae than polychaetes.

Definition of Oligochaeta in US English:

Oligochaeta

plural nounˌäliɡōˈkēdə
Zoology
  • A class of annelid worms which includes the earthworms. They have simple setae projecting from each segment and a small head lacking sensory appendages.

    〔动〕寡毛纲

    Example sentencesExamples
    • In traditional classification schemes, the Annelida consists of the Polychaeta and the Clitellata (the latter including the Oligochaeta and Hirudinida).
    • Annelids with a clitellum (a swelling towards the head of the animal, where the gonads are located) are classified in the Clitellata, which is further divided into Hirudinea and Oligochaeta (including the earthworms).
    • Stewart affectionately describes him as an elderly man - ‘a dabbler, a homebody’ - pottering about observing members of the taxonomic class Oligochaeta as they went about their business.
    • The phylum Annelida is traditionally divided into three classes: Oligochaeta, Hirudinida, and Polychaeta (marine annelids).

Origin

Modern Latin (plural), from oligo- ‘few’ + Greek khaitē ‘long hair’ (taken to mean ‘bristle’), because they have fewer setae than polychaetes.

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更新时间:2024/10/19 16:33:14