What is the woolly-skinned rhizoma or rootstock of a fern (Dicksonia barometz), which, when specially prepared and inverted, somewhat resembles a lamb; -- called also Scythian lamb called?

barometz — The woolly-skinned rhizoma or rootstock of a fern (Dicksonia barometz), which, when specially prepared and inverted, somewhat resembles a lamb; -- called also Scythian lamb. (Webster's 1913.)

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