hemimetabola

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Thân thiện
Definition
  1. Noun:
    • A subclass of insects: "Hemimetabola" is a scientific term in entomology referring to a specific subclassification of insects.
    • Characterized by a specific type of development: This group is defined by undergoing gradual and usually incomplete metamorphosis. This means the young (nymphs) resemble the adults but are smaller and lack fully developed wings and reproductive organs. They mature through a series of molts without a pupal stage.
Usage Examples
  • Noun:
    • Grasshoppers and true bugs belong to the hemimetabola. (This states the taxonomic group of these insects.)
    • The life cycle of hemimetabola includes egg, nymph, and adult stages. (This describes the developmental process characteristic of the group.)
    • Entomologists study the differences between hemimetabola and holometabola. (This uses the term in a comparative scientific context.)
Advanced Usage
  • The term is primarily used in formal, academic, or scientific writing (e.g., research papers, textbooks) rather than in everyday conversation.
  • It can be used adjectivally in a hyphenated form (e.g., ) to describe the type of metamorphosis. However, the core term "hemimetabola" itself is a noun.
Variants and Related Words
  • Hemimetabolous (adj): Describing the type of metamorphosis.
  • Hemimetabolism (n): The condition or process of undergoing incomplete metamorphosis.
  • Exopterygota: A nearly synonymous term often used interchangeably with Hemimetabola, emphasizing that wing development occurs externally.
  • Nymph (n): The immature stage of a hemimetabolous insect.
Synonyms
  • Incomplete metamorphosis: This is the descriptive phrase for the process, not a direct synonym for the taxonomic group.
  • Exopterygota: As mentioned, this is a closely related taxonomic term.
Related Phrases / Compound Terms
  • Hemimetabolous insect: An insect belonging to the Hemimetabola.
  • Hemimetabolous development: The specific pattern of growth and maturation.
Notes on Meaning
  • Scientific Classification: "Hemimetabola" is a taxonomic rank. It is not a description of a single insect but a category containing many insect orders (e.g., Orthoptera - grasshoppers, Hemiptera - true bugs, Odonata - dragonflies).
  • Contrast with Holometabola: Its meaning is often defined in contrast to holometabola (insects with complete metamorphosis: egg, larva, pupa, adult). Understanding one term helps define the other.
Noun
  1. subclass of insects characterized by gradual and usually incomplete metamorphosis

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