Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

pond scum

noun

Definition of pond scum

  1. 1 :  any of various algae (especially spirogyra) or cyanobacteria

  2. 2 :  a mass of tangled filaments of algae or cyanobacteria in stagnant waters



1864

First Known Use of pond scum

1864


Learn More about pond scum


Seen and Heard

What made you want to look up pond scum? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the range of perception or understanding

Get Word of the Day daily email!