any naturally occurring or synthetically produced containing alkali-metal or alkaline-earth-metal ions, as a feldspar, zeolite, or beryl.
a silicate in which some of the silicon in the tetrahedral unit SiO4 has been replaced by aluminium
- Alum rock
a town in W central California, near San Jose.
any of several North American plants belonging to the genus Heuchera, of the saxifrage family, especially H. americana, having mottled foliage and greenish-white flowers. the of any of these plants, used as an astringent. noun any of several North American plants of the saxifragaceous genus Heuchera, having small white, reddish, or green bell-shaped flowers and […]
a mineral, a hydrous sulfate of potassium and aluminum, KAl 3 (SO 4) 2 (OH) 6 , commonly occurring in fine-grained masses. Historical Examples Of other natural mineral sources, alunite is the most important. The Economic Aspect of Geology C. K. Leith One of the interesting features of this occurrence is the abundance of alunite. […]
variant of , especially before a vowel.