raphe

American  

[ray-fee] / ˈreɪ fi /

noun

• raphae
  plural

1. Anatomy. a seamlike union between two parts or halves of an organ or the like.

2. Botany.

   1. (in certain ovules) a ridge connecting the hilum with the chalaza.

   2. a median line or slot on a cell wall of a diatom.

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raphe British  

/ ˈreɪfɪ /

noun

1. an elongated ridge of conducting tissue along the side of certain seeds

2. a longitudinal groove on the valve of a diatom

3. anatomy a connecting ridge, such as that between the two halves of the medulla oblongata

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raphe Scientific  

/ rā′fē′ /

• raphae
  plural

1. A seamlike line or ridge between two similar parts of a body organ, as in the scrotum.

2. The portion of the funiculus that is united to the ovule wall, commonly visible as a line or ridge on the seed coat.

3. A groove in the frustule of some diatoms.

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Other Word Forms

Noun Inflected Forms

• raphae
  plural

Etymology

Origin of raphe

1745–55; < New Latin < Greek rhaphḗ seam, suture, akin to rháptein to sew, stitch together

Example Sentences

See Examples For:

raphe

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 Parkinson’s does progress to the serotonin symptom and destroy the serotonin cells in the raphe.

From Scientific American ● Jun. 25, 2012

Seeds variable in size and shape, usually notched at upper end and characterized always by a bottle-necked, elongated beak; chalaza broad, usually rough, distinct; raphe indistinct.

From Manual of American Grape-Growing by U. P. Hedrick