We found 4 dictionaries that define the word calculating machines:

General (3 matching dictionaries)

1. calculating machines: Merriam-Webster
2. calculating machines: Vocabulary.com
3. Calculating machines, The Calculating Machines: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

4. Calculating Machines: Encyclopedia

(Note: See calculating_machine as well.)

Definitions from WordNet (calculating machine) ▸ noun:  a small machine that is used for mathematical calculations ▸ Also see calculating_machine ▸ Words similar to calculating machines ▸ Usage examples for calculating machines ▸ Idioms related to calculating machines ▸ Wikipedia articles (New!) ▸ Words that often appear near calculating machines ▸ Rhymes of calculating machines ▸ Invented words related to calculating machines