American Heritage Dictionary of the English Language, 5th Edition
Formed as opsÅn- (the present stem of the Classical Latin obsÅnÅ, opsÅnÅ: “I purchase provisions", “I cater") + the English-ic; compare the contemporary Englishopsonin and the slightly later Frenchopsonique.
Opsonic Sentence Examples
In this case a general reaction is stimulated by the vaccine which may aid in the destruction of the invading organisms. In regulating the administration of such vaccines he has introduced the method of observing the opsonic index, to which reference is made below.
Of these the most important are (a) bacteriolytic or lysogenic action, (b) agglutinative action, and (c) opsonic action.
In estimating the opsonic power of the serum in cases of disease a control with normal serum is made at the same time and under precisely the same conditions.