[ si-nap-sis ]
/ sɪˈnæp sɪs /

noun, plural syn·ap·ses [si-nap-seez] /sɪˈnæp siz/.

Also called syndesis. Cell Biology. the pairing of homologous chromosomes, one from each parent, during early meiosis.
Physiology. synapse.

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 forms

syn·ap·tic [si-nap-tik] /sɪˈnæp tɪk/, syn·ap·ti·cal, adjectivesyn·ap·ti·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for synaptic

  • Perhaps compose a fiction about hard-wired fictionalizing, a fiction that reminds readers of their synaptic deceptions.

  • Synaptic cells summed and integrated, cancelled and compared and with saucy assurance sent the findings on toward Cumulative.

    We're Friends, Now|Henry Hasse
  • Time-travel always raises the synaptic delay threshold, but the trouble is it's so variable.

    The Ego Machine|Henry Kuttner
  • One thing remained, unasked and unbeknownst, grooved with synaptic permanence in their burgeoning brains.

    The Beginning|Henry Hasse

British Dictionary definitions for synaptic (1 of 2)



/ (sɪˈnæptɪk) /


of or relating to a synapse

Derived Forms

synaptically, adverb

British Dictionary definitions for synaptic (2 of 2)


/ (sɪˈnæpsɪs) /

noun plural -ses (-siːz)

cytology the association in pairs of homologous chromosomes at the start of meiosis
another word for synapse

Word Origin for synapsis

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

Medicine definitions for synaptic (1 of 2)


[ sĭ-năptĭk ]


Of or relating to synapsis or a synapse.

Medicine definitions for synaptic (2 of 2)


[ sĭ-năpsĭs ]

n. pl. syn•ap•ses (-sēz)

The side-by-side association of homologous paternal and maternal chromosomes during early meiotic prophase.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.