Definition from Wiktionary, the free dictionary
- Any of a small number of different small, slow-growing pine trees found in the western United States, of Pinus subg. Ducampopinus, Pinus sect. Balfourianae, some of which are over 4,000 years old.
- (small, slow-growing pines): Rocky Mountains bristlecone pine (Pinus aristata) of Colorado, New Mexico, and Arizona; Great Basin bristlecone pine (Pinus longaeva), of Utah, Nevada, and eastern California; foxtail pine (Pinus balfouriana), of California and southern Oregon.