underclay

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English[edit]

Etymology[edit]

under- +‎ clay

Noun[edit]

underclay (plural underclays)

  1. (geology) A stratum of clay lying beneath a coal bed.
Retrieved from "https://en.wiktionary.org/w/index.php?title=underclay&oldid=51778606"