raphe

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Last year, Siver discovered a new genus of diatom (he has discovered 60 new species over the past 20 years) that sheds light on the origin of the "raphe" -- a slit that appears along the long axis of pennate diatoms.

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Definitions (17)

Toggle American Heritage definitions American Heritage Dictionary (3)

  1. noun Anatomy A seamlike line or ridge between two similar parts of a body organ, as in the scrotum.
  2. noun Botany The portion of the funiculus that is united to the ovule wall, commonly visible as a line or ridge on the seed coat.
  3. noun The median groove of a diatom valve.

Toggle Century definitions Century Dictionary (12)

Toggle GNU Webster definitions GNU Webster's 1913 (1)

Toggle WordNet definitions WordNet (1)

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Examples

  • Serotonin's headquarters is a complex of closely associated central bodies buried deep in the brain stem, above where the brain meets the spinal cord, called the raphe nuclei. —  Omni: October 1993
  • Last year, Siver discovered a new genus of diatom (he has discovered 60 new species over the past 20 years) that sheds light on the origin of the "raphe" -- a slit that appears along the long axis of pennate diatoms. —  TreeHugger
  • * In these, and in the other cases in which the raphe is on the outer side, or that most remote from the placenta, the ovula are in reality resupinate; an economy apparently essential to their development Footnote. —  Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2
  • Serotonergic neurons in the dorsal raphe are recognized to play an important role in food intake —  PLoS ONE Alerts: New Articles
  • Taché Y, Yang H, Kaneko H (1995) Caudal raphe-dorsal vagal complex peptidergic projections: role in gastric vagal control. —  PLoS ONE Alerts: New Articles
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. New Latin, from Greek rhaphē, seam, suture, from rhaptein, to sew; see wer-2 in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. New Latin, properly rhaphe; from Greek ῤαφή, a seam, suture, from ῤάπτειν, sew: see rhapsode.
 

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/ˈreɪfi/
by American Heritage

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