Definition of Opsonin

1. Noun. An antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes.

Substance meronyms: Blood Serum, Serum
Generic synonyms: Antibody

Definition of Opsonin

1. Noun. Any antibody that causes an invading species to be more susceptible to phagocytosis ¹

¹ Source: wiktionary.com

Definition of Opsonin

1. an antibody of blood serum [n -S]

Medical Definition of Opsonin

1. Substance that binds to the surface of a particle and enhances the uptake of the particle by a phagocyte. Probably the most important in mammals derive from complement (C3b or C3bi) or immunoglobulins which are bound through the Fc receptor). This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Opsonin

opsins
opsiometer
opsiometers
opsiuria
opsoclonus
opsogen
opsomania
opsonation
opsonic
opsonic index
opsonies
opsonified
opsonifies
opsonify
opsonifying
opsonin (current term)
opsonins
opsonisation
opsonise
opsonised
opsonises
opsonising
opsonium
opsoniums
opsonization
opsonize
opsonized
opsonizes
opsonizing
opsonocytophagic

Literary usage of Opsonin

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1908)
"The opsonin of immune serum acts in a distinctly different manner from the opsonin of ... While the normal opsonin is of the nature of the complement, ..."

2. Surgical After-treatment by Le Roi Goddard Crandon, Albert Ehrenfried (1912)
"opsonin AND PHAGOCYTOSIS There is, however, beyond these distinctly antibacterial ... The opsonin so affects the bacteria by combination with their cell ..."

3. Principles of Immunology by Howard Thomas Karsner, Enrique Eduardo Ecker (1921)
"actual difference in the nature of normal and immune opsonin, but this view has now been almost entirely abandoned. In the discussion of this change of view ..."

4. Manual of bacteriology by Robert Muir, James Ritchie (1913)
"To this they gave the name of " opsonin " (vide pp. 123). There is no phagocytosis of cocci by leucocytes washed in salt solution ; normal serum heated to ..."

5. Principles of Immunology by Howard Thomas Karsner, Enrique Eduardo Ecker (1921)
"actual difference in the nature of normal and immune opsonin, but this view has now been almost entirely abandoned. In the discussion of this change of view ..."

6. Pathogenic Micro-organisms: Including Bacteria and Protozoa; a Practical by William Hallock Park, Anna Wessels Williams (1910)
"Muir and Martin believe from their experiments that the thermo-labile opsonin of normal serum and the thermo-stable opsonin are two entirely distinct ..."

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