pennate

Thân thiện

A single pennate seed drifts slowly toward the forest floor.

Definition

Adjective: 1. Having feathered wings: Describes something, typically an organism or a structure, that possesses wings with feathers or wing-like structures arranged in a feather-like pattern. 2. Resembling or having the form of a feather: Used in scientific contexts, particularly biology and anatomy, to describe structures that have a feather-like shape or arrangement, such as certain muscles or diatoms.

Usage Examples

• Adjective:
  • The pennate muscles in the human leg are named for their feather-like fiber arrangement.
  • Many birds are pennate creatures, enabling powered flight.
  • Under the microscope, the diatom exhibited a clear pennate symmetry.

Advanced Usage

• In Scientific Terminology: The term is primarily used in technical fields.
  • In ornithology, the term 'pennate' is fundamental when classifying flight capabilities.
  • The botanist identified the algae as a member of the pennate diatoms due to its bilateral symmetry.

Variants and Related Words

• Bipennate (adj): A muscle where the fibers are arranged on both sides of a central tendon, resembling a feather from both sides.
  • The rectus femoris is a classic example of a bipennate muscle.
• Unipennate (adj): A muscle where the fibers are arranged on one side of a central tendon.
  • The extensor digitorum longus is a unipennate muscle.
• Pennation (n): The condition or arrangement of being pennate; the feather-like arrangement itself.
  • The pennation angle affects the muscle's force production.

Synonyms

• Feathered: Having feathers.
• Pinnate: In botany, describing a compound leaf with leaflets arranged on each side of a common axis, similar to a feather. (Note: 'Pinnate' is a close synonym in form but used in different biological contexts).

Related Phrases and Terms

• Pennate Diatom: A major group of diatoms (algae) characterized by their elongated, bilaterally symmetrical shape.
  • The sample was rich in both centric and pennate diatoms.
• Pennate Muscle: A muscle with fascicles that attach obliquely to its tendon.
  • Pennate muscles can pack more fibers than parallel muscles, generating greater force.

Học thuật

Adjective

1. having feathered wings