Definition

1. Noun:
   • (Biology) A fundamental category of biological classification: A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. This is the primary scientific meaning.
   • A distinct kind or sort: A particular type, category, or form of something, often used in a more general or figurative sense.

Usage and Examples

• Noun (Biology):
  • The conservation efforts aim to protect the endangered species.
  • Darwin's theory explores how new species evolve over time.
• Noun (Kind/Sort):
  • He felt a species of excitement he had never known before.
  • A strange species of fungus was growing on the old logs.

Advanced Usage

• "The species": When used with the definite article, it can refer specifically to humankind.
  • Is the survival of the species our ultimate responsibility?
• In legal/formal contexts: Used to denote a specific class or type within a broader category.
  • The court recognized a new species of intellectual property right.

Variants and Related Words

• Subspecies (n): A taxonomic category that ranks below species, often a geographically isolated group.
  • The tiger population in Sumatra is considered a distinct subspecies.
• Speciation (n): The evolutionary process by which populations evolve to become distinct species.
• Specific (adj): Relating to or characterized by a distinct kind. (Note: Shares a Latin root with 'species').

Synonyms

• Kind: A group of people or things having similar characteristics.
• Type: A category of people or things having common characteristics.
• Variety: A number or range of things of the same general class that are distinct in character.
• (In biology) Taxon / Taxonomic group.

Phrases and Collocations

• Endangered species: A species at risk of extinction.
• Invasive species: A non-native species that spreads widely and causes harm to the environment, economy, or human health.
• Species barrier: The natural mechanisms that prevent cross-species infection or breeding.

Idioms and Fixed Expressions

• A species of...: A somewhat formal or literary way to say "a kind of" or "a sort of," often implying a unique or hard-to-define type.
  • There was a species of melancholy in her smile.

Noun

1. a specific kind of something
   • a species of molecule
   • a species of villainy
2. (biology) taxonomic group whose members can interbreed