Search Result for "synapsis": 
Wordnet 3.0

NOUN (1)

1. the side by side pairing of homologous maternal and paternal chromosomes at the start of meiosis; 



WordNet (r) 3.0 (2006):

synapsis
    n 1: the side by side pairing of homologous maternal and
         paternal chromosomes at the start of meiosis