[guh-lee-nuh] 
| a common, heavy mineral, lead sulfide, PbS, occurring in lead-gray crystals, usually cubes, and cleavable masses: the principal ore of lead. |
[guh-lee-nahyt] .
| ga·le·na (gə-lē'nə) n. A gray mineral, essentially PbS, the principal ore of lead. [Latin galēna, lead ore.] |
| Ga·le·na (gə-lē'nə) A city of extreme northwest Illinois west-northwest of Rockford. A prosperous river port until the 1860s, it was the home of Ulysses S. Grant, whose residence is now a museum. Population: 3,400. |