tomentum

/tou'mentəm/

Thân thiện

A botanist examines the soft tomentum on a peach leaf.

Definition

1. Noun:
   • A dense covering of short, matted, woolly hairs: In botany, "tomentum" refers to a coating of soft, downy hairs on the surface of a plant, such as on leaves or stems.
   • A network of fine blood vessels: In anatomy, "tomentum" refers to a felt-like layer of minute blood vessels, specifically the network between the pia mater and the cerebral cortex of the brain.

Examples of Usage

• Noun (Botany):

  • The underside of the leaf was covered in a silvery tomentum.
  • The plant's stems are protected by a thick tomentum that reduces water loss.

• Noun (Anatomy):

  • The tomentum is part of the brain's vascular system.
  • Damage to the cerebral tomentum can affect blood supply to the cortex.

Advanced Usage

• "Tomentose" (Adjective): Covered with tomentum; having a woolly or downy surface.
  • The tomentose leaves give the shrub a distinctive gray-green appearance.

Variants and Related Words

• Tomentose (adj): Describing a surface covered with dense, matted, woolly hairs.
• Tomentulose (adj): Slightly or minutely tomentose.
• Indumentum (n): A general term for a covering of hairs or fuzz on a plant or insect, often used in similar contexts.

Synonyms

• Pubescence (n): A covering of fine soft hairs; fuzz.
• Down (n): A covering of soft, fine feathers or hairs.
• Fuzz (n): A mass of short, fine fibers or hairs.

Related Phrases and Idioms

(This word is highly technical and is not commonly used in idiomatic expressions or phrasal verbs.)

Học thuật

Noun

1. a network of tiny blood vessels between the cerebral surface of the pia mater and the cerebral cortex
2. filamentous hairlike growth on a plant
   • peach fuzz

Từ đồng nghĩa

• tomentum cerebri
• hair
• fuzz