syn·ap·to·ne·mal complex sə-.nap-tə-.nē-məl- or syn·ap·ti·ne·mal complex same n a complex triparite protein structure that spans the region between synapsed chromosomes in meiotic prophase
* * *
a ladderlike structure consisting of two lateral elements connected to a central element by tranverse filaments that joins together homologous chromosomes in synapsis; it is formed during the zygotene and disintegrates during the early diplotene.Medical dictionary. 2011.