1. a person who is skilled in arithmetic or mathematics

Examples

• The young arithmetician could solve complex problems in her head.
• As the company’s chief arithmetician, he handled all financial calculations.
• The school hired an experienced arithmetician to tutor struggling students.
• She was known as a brilliant arithmetician who rarely made computational errors.
• The ancient arithmetician developed new methods for multiplication.
• Every bank needs a skilled arithmetician to verify transactions.