D defs.my
Entry 1 sense Webster, 1913

Alum root

/ăl'-əm ro͞ot/ · Al·um root · IPA
01 A North American herb (Heuchera Americana) of the Saxifrage family, whose root has astringent properties.
  1. 1.
    A North American herb (Heuchera Americana) of the Saxifrage family, whose root has astringent properties.(Bot.)