[ al-uh m ]
/ ˈæl əm /
a town in W central California, near San Jose.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for alum rock
Alum-rock, or alum-stone, is a species of impure alunite, and is not of very common occurrence.