• synonyms


[ 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.

Nearby words

synalepha, synalgia, synaloepha, synapse, synapsid, synapsis, synapte, synaptic, synaptic cleft, synaptic conduction, synaptic gap

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for synapsis

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

    Studies in Spermatogenesis|Nettie Maria Stevens
  • 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
  • There is in the male, in addition to the X, also a Y chromosome, which acts as its mate in synapsis and reduction.

British Dictionary definitions for synapsis


/ (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

Word Origin and History for synapsis



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

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for synapsis


[ 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.