pin·e·al 
(pĭnē-əl, pīnē-)
(pĭnē-əl, pīnē-)adj.
1. Having the form of a pine cone.
2. Of or relating to the pineal gland.
[French pinéal, from Latin pīnea, pine cone, from feminine of pīneus, of pine, from pīnus, pine tree; see peiə- in the Appendix of Indo-European roots.]