We found 21 dictionaries that define the word pond scum:

General (16 matching dictionaries)

1. pond scum: Longman Dictionary of Contemporary English
2. pond scum: Merriam-Webster
3. pond scum: Oxford Learner's Dictionaries
4. pond scum: American Heritage Dictionary of the English Language
5. pond scum: Collins English Dictionary
6. pond scum: Vocabulary.com
7. pond-scum: Wordnik
8. pond scum: Wiktionary
9. pond scum: The Wordsmyth English Dictionary-Thesaurus
10. pond scum: Infoplease Dictionary
11. pond scum: Dictionary.com
12. Pond scum: Wikipedia, the Free Encyclopedia
13. pond scum: Rhymezone
14. pond scum: FreeDictionary.org
15. pond scum: Mnemonic Dictionary
16. pond scum: TheFreeDictionary.com

Computing (1 matching dictionary)

17. pond scum: Encyclopedia

Medicine (1 matching dictionary)

18. pond scum: Medical dictionary

Slang (2 matching dictionaries)

19. pond scum: Green’s Dictionary of Slang
20. pond scum: Urban Dictionary

Tech (1 matching dictionary)

21. Lake and Water Word Glossary (No longer online)

(Note: See pond_scums as well.)

Definitions from Wiktionary (pond scum) ▸ noun:  Algae, especially when growing on the surface of a pond. ▸ noun:  (figuratively) Worthless, insignificant person or people. Similar: pondscum, scum, pondlife, pond life, algal mat, mulm, pondwater, pondweed, algal bloom, poolfish, more... Opposite: pristine, pure, clean, clear Phrases: pond scum parasite, like pond scum, more... Adjectives: alliaceous, hayseed, resiny, tartareous, yeastlike, limy, farinose, gummous, thistly, vert, fabaceous ▸ Words similar to pond scum ▸ Usage examples for pond scum ▸ Idioms related to pond scum ▸ Wikipedia articles (New!) ▸ Words that often appear near pond scum ▸ Rhymes of pond scum ▸ Invented words related to pond scum