coma

/'koumi:/

Thân thiện

A bright comet's coma glows as it travels through the solar system.

Definition

1. Noun (Medical):

   • A state of deep and often prolonged unconsciousness, typically resulting from severe illness, injury, or a medical condition, where a person cannot be awakened and fails to respond normally to stimuli.

2. Noun (Astronomy):

   • The nebulous, luminous envelope of gas and dust that surrounds the nucleus of a comet, forming as the comet nears the sun and its ices begin to vaporize.

3. Noun (Botany):

   • A usually terminal tuft or cluster, such as a crown of bracts (e.g., on a pineapple) or a tuft of hairs, especially on certain seeds, aiding in dispersal.

Usage Examples

• Noun (Medical):

  • The patient remained in a coma for three weeks following the accident.
  • Doctors are trying to determine the cause of her sudden coma.

• Noun (Astronomy):

  • Through the telescope, we could see the comet's bright coma.
  • The coma of the comet became more visible as it approached the inner solar system.

• Noun (Botany):

  • The seed's coma allows it to be carried by the wind.
  • The distinctive coma of the pineapple fruit is formed from leafy bracts.

Advanced Usage

• "Induced coma": A medically controlled state of deep unconsciousness, often used to protect the brain during major surgery or after a traumatic injury.

  • The surgeons placed the patient in an induced coma to reduce brain swelling.

• "Coma scale": A reference to clinical scales, such as the Glasgow Coma Scale, used to assess the depth and duration of impaired consciousness.

  • His score on the coma scale showed a slight improvement.

Variants and Related Words

• Comatose (adjective): Being in a state of coma; resembling a coma.
  • The comatose patient showed no signs of waking.

Synonyms

• Medical: Unconsciousness, stupor, blackout.
• Astronomy: Halo, envelope, cloud.
• Botany: Tuft, pappus, crown.

Related Phrases

• "Slipping into a coma": The process of entering a comatose state.

  • After the fever spiked, he began slipping into a coma.

• "Come out of a coma": To regain consciousness after being in a coma.

  • Miraculously, she came out of the coma after several months.

Related Idioms

• "In a deep coma": Emphasizing a profound state of unconsciousness with little responsiveness.

  • He has been in a deep coma since the stroke.

• "Coma-like sleep": A metaphorical expression for an extremely deep, heavy sleep.

  • After the long journey, she fell into a coma-like sleep.

Học thuật

Noun

1. (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
2. (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
3. a state of deep and often prolonged unconsciousness; usually the result of disease or injury

Từ đồng nghĩa

• comatoseness