hand calculator
Học thuậtThân thiện
Definition
Noun: A small, portable electronic device used for performing mathematical calculations. It is designed to be held in one hand or carried in a pocket.
Usage
The term "hand calculator" specifically describes the physical, portable nature of the device. It is used to distinguish from larger, non-portable calculating machines or software calculators on computers and phones. * Before the exam, the teacher reminded students to bring a hand calculator. * He pulled a hand calculator from his pocket to quickly figure the tip.
Advanced Usage
- Historical Context: The term was more common in the late 20th century when portable electronic calculators first became widely available, distinguishing them from mechanical adding machines or slide rules.
- The introduction of the affordable hand calculator in the 1970s revolutionized classrooms and offices.
Variants and Related Words
- Calculator (n): The more common and general term for any device that performs calculations. A "hand calculator" is a type of calculator.
- Most smartphones have a built-in calculator app.
- Pocket calculator (n): A direct synonym for "hand calculator," emphasizing its portability.
- He always keeps a pocket calculator in his briefcase.
Synonyms
- Pocket calculator
- Portable calculator
Antonyms
- Desktop calculator (a larger, non-portable calculating machine)
- Adding machine (a mechanical or electronic device, often not hand-held)
Related Phrases/Compounds
- Solar-powered calculator: A hand calculator that uses solar cells for power.
- The solar-powered calculator never needs batteries.
- Graphing calculator: An advanced type of hand-held calculator capable of plotting graphs and solving complex equations.
- The engineering course requires a specific model of graphing calculator.
Noun
- a calculator small enough to hold in the hand or carry in a pocket