opsonic

opsonic

A doctor examines a patient's opsonic index on a medical chart.

Definition
  1. Adjective:
    • Relating to opsonin: "opsonic" refers to or is associated with opsonin, a substance in blood serum that enhances the ability of immune cells (such as phagocytes) to engulf and destroy bacteria or other foreign particles.
    • Having the effect of opsonin: Describes something that acts like or involves the action of opsonin, typically in the context of immunology.
Usage Examples
  • Adjective:
    • The opsonic activity of the serum was measured to assess immune function. (The serum's ability to enhance phagocytosis was evaluated.)
    • Opsonins are crucial for opsonic binding to bacterial surfaces. (The binding process that helps immune cells target bacteria.)
    • A low opsonic index may indicate a weakened immune response. (A low measure of opsonin effectiveness.)
Advanced Usage

  • "opsonic index": A numerical measure of the relative amount of opsonin in the blood, used historically to gauge immune strength.

    • The patient's opsonic index was below normal after the infection. (The measure of opsonin activity was reduced.)

  • "opsonic activity": The capacity of a substance (like antibodies or complement proteins) to coat pathogens and promote phagocytosis.

    • Researchers studied the opsonic activity of different antibodies. (They examined how well antibodies enhanced immune cell ingestion.)
Variants and Related Words

  • Opsonin (n): a substance (such as an antibody or complement protein) that binds to foreign particles and makes them more susceptible to phagocytosis.

    • Opsonins are essential for effective clearance of bacteria. (These substances aid immune cells in removing invaders.)

  • Opsonize (v): to make (a pathogen) more susceptible to phagocytosis by coating it with opsonins.

    • The immune system opsonizes bacteria to allow macrophages to engulf them. (It coats bacteria for easier destruction.)
Synonyms
  • Phagocytic-enhancing: relating to the process of increasing phagocytosis.
  • Immunoadhesive: describing the binding of immune components to targets.
Related Idioms
  • No common idioms: "opsonic" is a highly technical term used primarily in medical and immunological contexts, with no established idiomatic usage.
Phrasal Verbs
  • No phrasal verbs: As a technical adjective, "opsonic" does not form phrasal verbs.