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A genus of tall conifers of the pine family. The species are confined mostly to South America and Australia. The wood cells differ from those of other in having the dots in their lateral surfaces in two or three rows, and the dots of contiguous rows alternating. The seeds are edible.

Relating to, or of the nature of, the Araucaria. The earliest conifers in geological history were mostly Araucarian. Dana.

A lofty coniferous Chilian tree (Araucaria imbricata), the branches of which are so crowded and intertwisted "as to puzzle a monkey to climb." The edible nuts are over an inch long, and are called piñon by the Chilians.

(Bot.) See under Ground. -- Norfolk Island pine (Bot.), a beautiful coniferous tree, the Araucaria excelsa. -- Pine barren, a tract of infertile land which is covered with pines. [Southern U.S.] -- Pine borer (Zoöl.), any beetle whose larvæ bore into pine trees. -- Pine finch. (Zoöl.) See Pinefinch, in the Vocabular…