noun
Meaning 1
A boulder worn by running water that is too large to be rolled as a pebble, worn smooth on the upstream or seaward side and exposed top and with a sharp ridge on the downstream or landward side.
Definition source: English Wiktionary via Wiktextract
Topics: geography, geology, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided