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
By expelling a stream of mucopolysaccharides from the raphe, the diatom can attach to surfaces or propel itself in one direction.
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
There are probably many more things mediating a response to an unfair offer than just serotonin transporter levels in the raphe of the brain.
From Scientific American ● Mar. 19, 2012
There is little doubt that the movements are connected with the raphe, and in some diatoms there is much evidence to prove that they are due to an exudation of mucilage.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various
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.
