raphe
Americannoun
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raphae
plural
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Anatomy. a seamlike union between two parts or halves of an organ or the like.
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Botany.
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(in certain ovules) a ridge connecting the hilum with the chalaza.
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a median line or slot on a cell wall of a diatom.
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noun
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an elongated ridge of conducting tissue along the side of certain seeds
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a longitudinal groove on the valve of a diatom
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anatomy a connecting ridge, such as that between the two halves of the medulla oblongata
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raphae
plural
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A seamlike line or ridge between two similar parts of a body organ, as in the scrotum.
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The portion of the funiculus that is united to the ovule wall, commonly visible as a line or ridge on the seed coat.
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A groove in the frustule of some diatoms.
Other Word Forms
Noun Inflected Forms
Etymology
Origin of raphe
1745–55; < New Latin < Greek rhaphḗ seam, suture, akin to rháptein to sew, stitch together
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The region, known as the dorsal raphe nucleus, or D.R.N., is best known for its link to depression.
From New York Times ● Sep. 5, 2016
Some diatoms exhibit a slit in their silica shell, called a raphe.
From Textbooks ● Jan. 1, 2015
It's not yet clear whether these changes are associated with altered gene expression in the neurons of the SCN and the raphe nucleus, another part of the brain region that regulates sleep.
From Nature ● May 22, 2013
And on the right is the correlation between the serotonin transporter density in the raphe and the % of unfair offers that were rejected.
From Scientific American ● Mar. 19, 2012
It may perhaps be unnecessary to remark, that the raphe, or vascular cord of the outer coat, almost universally belongs to that side of the ovulum which is next the placenta.
From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 by Phillip Parker King
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
