D defs.my
Entry 1 sense Webster, 1913

Pineal

/pīnˌ-ē'-əl/ · Pi·ne·al · IPA /ˈpɪnɪəl/
01 a. Of or pertaining to a pine cone; resembling a pine cone.
  1. 1.
    Of or pertaining to a pine cone; resembling a pine cone.
Phrases & compounds
Pineal gland — 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.