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English-Thai Dictionary
underclay
N
ดินเหนียว
ข้างใต้
Webster's 1913 Dictionary
UNDERCLAY
UNDERCLAY
Un
"
der
*
clay
`, n. (Geol.)
Defn: A
stratum
of
clay
lying
beneath
a
coal
bed,
often
containing
the
roots
of
coal
plants,
especially
the
Stigmaria.
The Wordsmith Dictionary
The Wordsmith Dictionary