a small electronic device or piece of software for calculating with numbers 计算器（指电子设备或软件） 
a pocket calculator 袖珍计算器 I used the calculator app on my phone. 我在手机上使用了计算器应用程序。 Exam candidates are not allowed to use advanced calculators with database capability. 考生不得使用有数据库功能的高级计算器。
Oxford Collocations Dictionaryadjective- desk
- hand-held
- …
Word Originlate Middle English: from Latin, from the verb calculare, from calculus ‘a small pebble ’(as used on an abacus).
