The Free On-line Dictionary of Computing (30 December 2018):

method invocation
invoking a method

    In object-oriented programming, the way the
   program looks up the right code to run when a method with a
   given name is called ("invoked") on an object.  The method is
   first looked for in the object's class, then that class's
   superclass and so on up the class hierarchy until a method
   with the given name is found (the name is "resolved").

   Generally, method lookup cannot be performed at compile time
   because the object's class is not known until run time.  This is
   the case for an object method whereas a class method is just
   an ordinary function (that is bundled with a given class) and can
   be resolved at compile time (or load time in the case of a
   dynamically loaded library).

   (2014-09-06)