pineal gland 名詞
 松果體,松果腺,人體松果腺
 Pi·ne·al a.  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.
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 E·piph·y·sis n.; pl. Epiphyses   Anat. (a) The end, or other superficial part, of a bone, which ossifies separately from the central portion, or diaphysis. (b) The cerebral epiphysis, or pineal gland. See Pineal gland, under Pineal.
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 pineal gland
      n : a small endocrine gland in the brain; situated beneath the
          back part of the corpus callosum; secretes melatonin
          [syn: pineal body, epiphysis cerebri, epiphysis]