Definition

1. Adjective:
   • Having a specific toe arrangement in birds: Describes a bird's foot where the first (hallux) and second toes point backward, while the third and fourth toes point forward. This is a specialized foot structure, contrasting with the more common "zygodactyl" arrangement (two toes forward, two toes backward).

Examples of Usage

• Adjective:
  • Trogons are unique for having heterodactyl feet, which is rare among birds.
  • The heterodactyl arrangement provides a strong grip for perching on vertical surfaces.

Advanced Usage

• Zoological Classification: The term is primarily used in scientific ornithology and zoology to classify and describe bird species based on foot morphology. It is a technical descriptor.
  • The heterodactyl condition is a key diagnostic feature for the family Trogonidae.

Variants and Related Words

• Heterodactylous (adj.): An alternative, less common adjective form with the same meaning.
  • The heterodactylous foot structure is an evolutionary adaptation.
• Heterodactyly (n.): The noun form referring to the condition of having heterodactyl feet.
  • Heterodactyly is observed in only a few bird families.

Different Meanings

• This word has a single, highly specific meaning in zoological anatomy. It does not have common figurative or alternative definitions.

Synonyms

• There is no direct common synonym. The description "having two toes backward and two forward" is the meaning itself. The antonym in ornithology is zygodactyl (having the first and fourth toes backward and the second and third forward, like parrots).

Idioms

• This is a technical term and is not used in idioms or common figurative expressions.

Phrasal Verbs

• This is an adjective and does not form phrasal verbs.

Adjective

1. (of bird feet) having the first and second toes directed backward the third and fourth forward