What is "analogism"

Analogism \A*nal"o*gism\, n. [Gr. ? course of reasoning, fr. ? to think over, to calculate]

1. (Logic) an argument from the cause to the effect; an a priori argument.
   --Johnson.

2. Investigation of things by the analogy they bear to each other.
   --Crabb.

n. 1 (context logic English) An argument from cause to effect; an a priori argument. 2 investigation of things by the analogy they bear to each other