• Webster's Revised Unabridged Dictionary
    • n Astyllen (Mining) A small dam to prevent free passage of water in an adit or level.
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Century Dictionary and Cyclopedia
    • n astyllen A small temporary dam or partition, made either of branches or twigs interlaced, or perhaps sometimes of a simple piece of board, and used either to check the flow of water under ground or to separate ore from refuse or attle on the surface.
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