Meaning Of The Word Underclay

Real Dictionary

What's the definition of Underclay? Find Underclay meanings, definitions and more at the Real Dictionary online.

Underclay Meaning

Underclay Definition
Underclay Definition

What's The Definition Of Underclay?

underclay in American English
a bed of clay lying immediately beneath a coal seam, often used as a fireclay

underclay in British English
noun: a grey or whitish clay rock containing fossilized plant roots and occurring beneath coal seams. When used as a refractory, it is known as fireclay

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