frog spit

WordReference Random House Unabridged Dictionary of American English © 2026

frog′ spit′, 

1. Microbiology Also, frog′ spit′tle. any of several filamentous freshwater green algae forming floating masses.
2. Insects cuckoo-spit (def. 1).
• 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::

frog spit, frog spittle noun

1. another name for cuckoo spit
2. a foamy mass of threadlike green algae floating on ponds