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synapsis

[si-nap-sis]
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noun, plural syn·ap·ses [si-nap-seez] /sɪˈnæp siz/.
  1. Also called syndesis. Cell Biology. the pairing of homologous chromosomes, one from each parent, during early meiosis.
  2. Physiology. synapse.
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Origin of synapsis

1645–55; < New Latin < Greek sýnapsis junction, equivalent to synap- (stem of synáptein to make contact, equivalent to syn- syn- + (h)áptein to touch) + -sis -sis
Related formssyn·ap·tic [si-nap-tik] /sɪˈnæp tɪk/, syn·ap·ti·cal, adjectivesyn·ap·ti·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for synapsis

Historical Examples

  • The method of synapsis in Coptocycla is like that described for Chelymorpha argus.

    Studies in Spermatogenesis

    Nettie Maria Stevens

  • There is in the male, in addition to the X, also a Y chromosome, which acts as its mate in synapsis and reduction.

  • From this synapsis the lower neurone proceeds, its axons travelling to the anterior horn and arborising around the motor cells.

  • The synizesis and synapsis stages are similar to those in Chelymorpha (figs. 61 and 62).

    Studies in Spermatogenesis

    Nettie Maria Stevens


British Dictionary definitions for synapsis

synapsis

noun plural -ses (-siːz)
  1. cytology the association in pairs of homologous chromosomes at the start of meiosis
  2. another word for synapse
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Word Origin

C19: from New Latin, from Greek sunapsis junction, from sunaptein to join together, from syn- + haptein to connect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for synapsis

n.

plural synapses, 1895 in biology, Modern Latin, from Greek synapsis "connection, junction" (see synapse).

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Online Etymology Dictionary, © 2010 Douglas Harper

synapsis in Medicine

synapsis

(sĭ-năpsĭs)
n. pl. syn•ap•ses (-sēz)
  1. The side-by-side association of homologous paternal and maternal chromosomes during early meiotic prophase.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.