underclay (0 synonym found)

We don't have any synonyms for underclay yet.

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undercoat  ·  underplay  ·  under way  ·  underlay  ·  underway

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Definition of underclay:

(n) : (geology) A stratum of clay lying beneath a coal bed.
Definition of underclay:

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