[al-uh
m-root, -root] 
| 1. | any of several North American plants belonging to the genus Heuchera, of the saxifrage family, esp. H. americana, having mottled foliage and greenish-white flowers. |
| 2. | the root of any of these plants, used as an astringent. |
| al·um·root (āl'əm-rōōt', -rŏŏt') n. Any of various North American perennials of the genus Heuchera having palmately lobed basal leaves and leafless stalks bearing numerous small greenish, white, or reddish flowers. [From the use of its root as an astringent.] |