Nearly all vertebrate species possess a pineal gland. The most important exception is the hagfish, which is often thought of as the most primitive type of vertebrate. Even in the hagfish, however, there may be a `pineal equivalent` structure in the dorsal diencephalon. The lancelet Branchiostoma lanceolatum, the nearest existing relative to vert.....
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http://en.wikipedia.org/wiki/Pineal_gland
An endocrine organ found in the brain. In some animals, it seems to serve as a light-influenced biological clock.
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http://www.bbc.co.uk/radio4/reith2003/glossary.shtml
endocrine gland found in vertebrates that is the source of melatonin, a hormone derived from tryptophan that regulates circadian rhythm (sleep ... [9 related articles]
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http://www.britannica.com/eb/a-z/p/69
A tiny organ in the cerebrum that produces melatonin. Also called pineal body and pineal organ.
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http://www.cancer.gov/dictionary?expand=P
A small, cone-shaped endocrine gland, also called the pineal body or epiphysis cerebri. The pineal gland extends posteriorly from the third ventricle of the brain. It consists of portions of neurons, neuroglial cells, and specialized secretory cells called pinealocytes. The pinealocytes synthesize t...
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http://www.daviddarling.info/encyclopedia/P/pineal_gland.html
A small, flat gland found within the brain which produces the hormones melatonin and serotonin. ... (09 Oct 1997) ...
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http://www.encyclo.co.uk/local/20973
pineal body.
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http://www.encyclo.co.uk/local/21001
Type: Term Synonyms: pineal body
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http://www.medilexicon.com/medicaldictionary.php?t=37202
Pineal gland: A small gland located deep within in the brain. It is believed to secrete melatonin, and may therefore be part of the body's sleep-regulation apparatus.
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http://www.medterms.com/script/main/art.asp?articlekey=4904
Gland at the base of the brain controlling melatonin levels.
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http://www.quick-facts.co.uk/medicene/anatomy.htm
[
n] - a small endocrine gland in the brain
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http://www.webdictionary.co.uk/definition.php?query=pineal%20gland
pineal gland A small cone-shaped organ of the brain that secretes the hormone melatonin into the bloodstream. It is one of the endocrine glands and is situated beneath the back part of the corpus callosum (the thick band of nerve fibers that connects the two hemispheres of the brain in higher mammals and allows the hemispheres to communicate).
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http://www.wordinfo.info/words/index/info/view_unit/1674/
Endocrine gland located in the dorsal midbrain; it secretes the hormone melatonin, which plays a role in regulating daily activity cycles (circadian rhythms).
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https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter
an organ that releases hormones for sleep
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https://sciencetrek.org/sciencetrek/topics/sleep/glossary.cfm
pineal body noun a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
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https://www.encyclo.co.uk/local/20974
A gland that secretes melatonin.
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https://www.sparknotes.com/psychology/psych101/glossary/terms/
No exact match found.
