UNDERCLAY

Etymology

Noun

underclay (plural underclays)

(geology) A stratum of clay lying beneath a coal bed.

Source: Wiktionary


Un"der*clay`, n. (Geol.)

Definition: A stratum of clay lying beneath a coal bed, often containing the roots of coal plants, especially the Stigmaria.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

26 November 2024

TRANSPOSITION

(noun) (music) playing in a different key from the key intended; moving the pitch of a piece of music upwards or downwards


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