dropstone (English, noun)
expansion: dropstone (plural dropstones)
Senses:
topics: geography
geology
natural-sciences
glosses: An isolated fragment of rock found within a sedimentary rock (that had fallen, rather than being carried along).
topics: geography
glaciology
natural-sciences
glosses: An isolated rock that is geologically distinct from the surroundings, indicating that it was carried from a distant area and then dropped in place (by a melting glacier); an erratic.
Forms:
form: dropstones
tags: plural