Noun: ratiocinator ,ra-shee'ó-su,ney-tu(r) or ,ra-tee'ow-su,ney-tu(r)- Someone who reasons logically
"The detective was known as a keen ratiocinator, able to solve the most puzzling cases";
- reasoner
Derived forms: ratiocinators
Type of: thinker
Encyclopedia: Ratiocinator