We found one dictionary that defines the word contra rotating propellers:

General (1 matching dictionary)

1. Contra-rotating propellers: Wikipedia, the Free Encyclopedia

▸ Words similar to contra rotating propellers ▸ Usage examples for contra rotating propellers ▸ Idioms related to contra rotating propellers ▸ Wikipedia articles (New!) ▸ Words that often appear near contra rotating propellers ▸ Rhymes of contra rotating propellers ▸ Invented words related to contra rotating propellers