bris·tle·cone pine (br s  l-k n )n. Either of two small slow-growing pines (Pinus aristata or P. longaeva) found at higher elevations of the western United States, having needles in fascicles of five. Specimens of P. longaeva in the Sierra Nevada are the oldest known living trees, achieving ages well over 4,000 years. |
bristlecone pine [ˈbrɪsəlˌkəʊn]
n
(Life Sciences & Allied Applications / Plants) a coniferous tree, Pinus aristata, of the western US, bearing cones with bristle-like prickles: one of the longest-lived trees, useful in radiocarbon dating
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| Noun | 1. |  bristlecone pine - small slow-growing upland pine of western United States (Rocky Mountains) having dense branches with fissured rust-brown bark and short needles in bunches of 5 and thorn-tipped cone scales; among the oldest living things some over 4500 years old |
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