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)

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Examples (50)

  • 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
  • Wotak: Please, I beg you, a sliver of pig belly, melted. cockroach: I will spare your scrotal raphe —  LinkSwarm.com
  • He is one of the m ore s olid photog raphe rs of the world. —  Recently Uploaded Slideshows
  • 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
  • (It may not sound that impressive to you and me but, according to Siver, the evolution of the raphe in diatoms is tantamount to the evolution of wings in a bird.) —  TreeHugger
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This word has been looked up 107 times.

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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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