We found 6 dictionaries that define the word trickling filter:

General (2 matching dictionaries)

1. trickling filter: Merriam-Webster
2. Trickling filter: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

3. trickling filter: Encyclopedia

Tech (3 matching dictionaries)

4. Lake and Water Word Glossary (No longer online)
5. Glossary of Water Resource Terms (No longer online)

Definitions from Wikipedia (Trickling filter) ▸ noun:  A trickling filter is a type of wastewater treatment system. ▸ Words similar to trickling filter ▸ Usage examples for trickling filter ▸ Idioms related to trickling filter ▸ Wikipedia articles (New!) ▸ Words that often appear near trickling filter ▸ Rhymes of trickling filter ▸ Invented words related to trickling filter