abscission

/æb'siʤn/

Thân thiện

A leaf undergoes abscission and falls from the tree.

Definition

1. Noun:
   • The act of cutting something off: The process or action of removing something by cutting it away.
   • The natural shedding of plant parts: In botany, the process by which a plant sheds leaves, flowers, or fruit following the formation of a specialized layer of cells (scar tissue) that allows the part to separate cleanly from the main body.

Usage Examples

• Noun:
  • The surgeon performed an abscission of the tumor. (The surgeon carried out the cutting off of the tumor.)
  • In autumn, the abscission of leaves is a beautiful and vital process for many trees. (In autumn, the shedding of leaves is a beautiful and vital process for many trees.)

Advanced Usage

• "Abscission layer": A specialized layer of cells that forms at the base of a leaf, flower, or fruit stem, facilitating its clean separation from the plant.
  • The formation of the abscission layer is triggered by changes in hormone levels.
• "Abscission zone": The specific region in a plant where the abscission layer forms.
  • The abscission zone is structurally weaker than the surrounding tissue.

Variants and Related Words

• Abscise (verb): To shed or cut off by abscission.
  • The plant will abscise its old leaves.
• Abscisic acid (noun): A plant hormone that plays a key role in processes like abscission and dormancy.
  • Abscisic acid is often called the 'stress hormone' in plants.

Synonyms

• Excision: The act of cutting out or off, especially surgically.
• Removal: The act of taking something away.
• Shedding: The process of getting rid of something naturally (e.g., leaves, skin).
• Detachment: The action of disconnecting or separating something.

Related Phrases

• To undergo abscission: To experience the process of being shed or cut off.
  • The ripe fruit is ready to undergo abscission.
• To induce abscission: To cause or trigger the shedding process.
  • The drought induced premature abscission of the flowers.

Related Idioms

(There are no common idioms directly using the word "abscission." It is a technical term.)

Học thuật

Noun

1. the act of cutting something off
2. shedding of flowers and leaves and fruit following formation of scar tissue in a plant

Từ đồng nghĩa

• cutting off