We found 3 dictionaries that define the word flap valves:

General (2 matching dictionaries)

1. flap valves: Merriam-Webster
2. flap valves: TheFreeDictionary.com

Computing (1 matching dictionary)

3. flap valves: Encyclopedia

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