pi·ñon also pin·yon 
(pĭnyōn′, -yən)
(pĭnyōn′, -yən)n. pl. pi·ñons or pi·ño·nes (pĭn-yōnēz) also pin·yons
1. Any of several pine trees of northern Mexico and the southwest United States that bear edible, nutlike seeds, especially Pinus edulis. Also called piñon pine.
2. An edible seed of any of these trees.
[Spanish piñón, pine nut, pine cone, augmentative of piña, from Latin pīnea, from feminine of pīneus, of pine, from pīnus, pine tree; see peiə- in the Appendix of Indo-European roots.]