\Pi"ne*al\, a. [L. pinea the cone of a pine, from pineus
of the pine, from pinus a pine: cf. F. pin['e]ale.]
Of or pertaining to a pine cone; resembling a pine cone.
{Pineal gland} (Anat.), a glandlike body in the roof of the
   third ventricle of the vertebrate brain; -- called also
   {pineal body}, {epiphysis}, {conarium}. In some animals it
   is connected with a rudimentary eye, the so-called pineal
   eye, and in other animals it is supposed to be the remnant
   of a dorsal median eye.