effusion

/i'fju:ʤn/
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effusion

The doctor observed an effusion of fluid around the patient's knee joint.

Definition
  1. Noun:
    • A flow of liquid or gas under pressure, often through a small opening or into a surrounding space: In physical and medical contexts, an effusion is the escape of fluid from its normal contained space into another area, such as into a body cavity or tissue.
    • An unrestrained, often excessive, outpouring of emotion or words: In a figurative sense, an effusion is an expression of feelings, thoughts, or speech that is gushing, enthusiastic, and not held back.
Usage Examples

  • Noun (Physical/Medical):

    • The doctor diagnosed a pleural effusion, which is a buildup of fluid around the lungs.
    • A sudden effusion of steam from the valve indicated a pressure problem.

  • Noun (Emotional/Verbal):

    • Her letter was an effusion of gratitude for their support during her illness.
    • The critic dismissed the poet's latest work as a sentimental effusion.
Advanced Usage

  • "Effusion of blood": A medical term for bleeding, especially when blood escapes into a body cavity or tissue.

    • The trauma resulted in an effusion of blood into the abdominal cavity.

  • Used in scientific contexts: Describes the process where gases flow through a tiny orifice.

    • Graham's law describes the relationship between the rate of effusion of a gas and its molar mass.
Variants and Related Words

  • Effuse (verb): To pour out or forth; to emanate or display an emotion freely.

    • The wound began to effuse blood.
    • She effused confidence during her presentation.

  • Effusive (adjective): Expressing feelings of gratitude, pleasure, or approval in an unrestrained, heartfelt manner.

    • He was effusive in his praise for the team's hard work.
Synonyms
  • Outpouring: A strong emotional expression or a sudden rapid flow.
  • Emanation: Something that flows out from a source.
  • Gush: A sudden and abundant flow or expression.
Antonyms
  • Restraint: Control over one's emotions or actions.
  • Containment: The action of keeping something under control or within limits.
Related Phrases and Idioms
  • "An effusion of joy": A common collocation describing a great, unrestrained display of happiness.
    • The winning goal was met with an effusion of joy from the fans.
effusion

The doctor observed an effusion of fluid around the patient's knee joint.

Noun
  1. flow under pressure
  2. an unrestrained expression of emotion

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