acantha

Thân thiện

A single acantha from a cactus glistens in the sunlight.

Definition

1. Noun:
   • A sharply pointed projection or spine: A rigid, pointed anatomical structure or natural outgrowth.

Usage Examples

• Noun:
  • The acantha on the plant's stem helps deter herbivores.
  • Under the microscope, the cell wall showed a tiny acantha.

Advanced Usage

• Botanical Context: Often used to describe the thorn-like structures on plants.
  • The cactus is covered in numerous acanthae for protection.
• Anatomical/Biological Context: Can refer to small, sharp protrusions on bones, cells, or certain marine organisms.
  • The vertebra's acantha was clearly visible in the X-ray.

Variants and Related Words

• Acanthoid (adj): Resembling a spine or thorn.
  • The acanthoid shape of the crystal was fascinating.
• Acanthous (adj): Pertaining to or having spines.
  • The acanthous surface of the seed pod.

Synonyms

• Spine: A sharp, pointed outgrowth.
• Prickle: A small, sharp point.
• Projection: Something that juts out.

Notes on Meaning

This is a specialized, technical term primarily used in scientific fields like botany, anatomy, and zoology. It is not commonly used in everyday conversation.

Học thuật

Noun

1. any sharply pointed projection

Từ đồng nghĩa

• spur
• spine