Definitions for pineal
ˈpɪn i əl, ˈpaɪ ni-, paɪˈni-pineal

Princeton's WordNetRate this definition:0.0 / 0 votes

1. pinealadjective

   relating to the pineal body

   "pineal hormone"

2. pinealadjective

   having the form of a pine cone

WiktionaryRate this definition:0.0 / 0 votes

1. pinealnoun

   The pineal gland.

2. pinealadjective

   In the shape of a pine cone.

3. pinealadjective

   Pertaining to the pineal gland.

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. Pinealadjective

   Resembling a pineapple. An epithet given by Des Cartes from the form, to the gland which he imagined the seat of the soul.

   Etymology: pineale, Fr.

   Courtiers and spaniels exactly resemble one another in the pineal gland. Scriblerus Club .

WikipediaRate this definition:0.0 / 0 votes

1. pineal

   The pineal gland, conarium, or epiphysis cerebri, is a small endocrine gland in the brain of most vertebrates. The pineal gland produces melatonin, a serotonin-derived hormone which modulates sleep patterns in both circadian and seasonal cycles. The shape of the gland resembles a pine cone, which gives it its name. The pineal gland is located in the epithalamus, near the center of the brain, between the two hemispheres, tucked in a groove where the two halves of the thalamus join. The pineal gland is one of the neuroendocrine secretory circumventricular organs in which capillaries are mostly permeable to solutes in the blood.Nearly all vertebrate species possess a pineal gland. The most important exception is a primitive vertebrate, the hagfish. Even in the hagfish, however, there may be a "pineal equivalent" structure in the dorsal diencephalon. The lancelet Branchiostoma lanceolatum, an early chordate which is a close relative to vertebrates, also lacks a recognizable pineal gland. The lamprey (another primitive vertebrate), however, does possess one. A few more complex vertebrates have lost pineal glands over the course of their evolution.The results of various scientific research in evolutionary biology, comparative neuroanatomy and neurophysiology have explained the evolutionary history (phylogeny) of the pineal gland in different vertebrate species. From the point of view of biological evolution, the pineal gland is a kind of atrophied photoreceptor. In the epithalamus of some species of amphibians and reptiles, it is linked to a light-sensing organ, known as the parietal eye, which is also called the pineal eye or third eye.René Descartes believed the human pineal gland to be the "principal seat of the soul". Academic philosophy among his contemporaries considered the pineal gland as a neuroanatomical structure without special metaphysical qualities; science studied it as one endocrine gland among many.

ChatGPTRate this definition:0.0 / 0 votes

1. pineal

   The pineal is a small, pine-cone shaped gland located in the brain, also known as the pineal gland. It is responsible for producing and releasing the hormone melatonin which regulates sleep patterns and circadian rhythms in humans and most mammals.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Pinealadjective

   of or pertaining to a pine cone; resembling a pine cone

2. Etymology: [L. pinea the cone of a pine, from pineus of the pine, from pinus a pine: cf. F. pinale.]

Editors ContributionRate this definition:0.0 / 0 votes

1. pineal

   Having the form of a cone.

   The pineal gland is located in the body of a human being.

   
   

   Submitted by MaryC on September 6, 2020  

Anagrams for pineal »

1. alpine

2. Nepali

3. penial

How to pronounce pineal?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say pineal in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of pineal in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of pineal in Pythagorean Numerology is: 3

Examples of pineal in a Sentence

1. Krister Smith:

   It’s important to recognize that there’s nothing mystical about the pineal and parapineal organs, they can sense light and play a role in the endocrine system. However, some of the abilities conferred by the pineal are really quite extraordinary. For instance, some lower vertebrates can sense the polarization of light with the third eye and use this to orient themselves geographically.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=pineal
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Pineal
3. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=pineal
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Pineal
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/pineal