Word: Reckoner
Definition: A "reckoner" is a noun that can have a couple of meanings. It refers to: 1. A handbook or book of tables that helps people with calculations. 2. A person who is very good at doing calculations or using calculating machines.
In more advanced contexts, "reckoner" may also be used in discussions about financial calculations or data analysis. For instance: - "The financial analyst was regarded as the best reckoner in the company due to her quick calculations."
While "reckoner" primarily refers to a calculator or a calculation book, it can also imply a person who evaluates or judges something.