underclay
noun
: a layer of clay beneath a coal bed often containing fossil roots of coal plants and constituting fireclay
Word History
Etymology
under entry 3 + clay
- grape cure
- grape family
- grape fern
- grape green
- grape house
- grape hyacinth
- grape ivy
- grape juice
- grape leaf folder
- grape leafhopper
- grape louse
- grape mealybug
- grape mildew
- grape phylloxera
- grape plume moth
- grape rootworm
- grape rot
- grape rust
- grape scale
- grape stake
- grape sugar
- grape tree
- grape wine
- grape-berry moth
- grape-seed oil