English: left parietal lobe(red) and corpus ca...
English: left parietal lobe(red) and corpus callosum, diencephalon, brainstem, cerebellum. Polygon data are from BodyParts3D maintained by Database Center for Life Science(DBCLS). 日本語: 左頭頂葉。内側面が見えるように右大脳半球は透明にして示してある。他、脳梁、間脳、脳幹、小脳を表示してある。 ポリゴンデータはDatabase Center for Life Science(DBCLS)の作成しているBodyParts3Dより。 (Photo credit: Wikipedia)


parietal \puh-RYE-uh-tul\ adjective

1.  of or relating to the walls of a part or cavity 2. of, relating to, or forming the upper posterior wall of the head 3: attached to the main wall rather than the axis or a cross wall of a plant ovary — used of an ovule or a placenta 4. of or relating to college living or its regulation; especially : of or relating to the regulations governing the visiting privileges of members of the opposite sex in campus dormitories


“In the 1950s, male college students served in the military but couldn’t vote, and colleges imposed parietal rules, which kept young men out of women’s dorms.” — Harrisburg Daily Register (Illinois), March 27, 2012

“[Tuatara] also have a pronounced parietal eye, a light-sensitive pineal gland on the top of the skull. This white patch of skin called its ‘third eye’ slowly disappears as they mature.” — From an article by Ray Lilley in The Associated Press, October 31, 2008

Did you know?

Fifteenth-century scientists first used “parietal” (from Latin “paries,” meaning “wall of a cavity or hollow organ”) to describe a pair of bones of the roof of the skull between the frontal and posterior bone. Later, “parietal” was also applied to structures connected to or found in the same general area as these bones; the parietal lobe, for example, is the middle division of each hemisphere of the brain. In the 19th century, botanists adopted “parietal” as a word for ovules and placenta attached to the walls of plant ovaries. It was also in the 19th century that “parietal” began to be heard on college campuses, outside of the classroom; in 1837, Harvard College established the Parietal Committee to be in charge of “all offences against good order and decorum within the walls.”


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