synaptic

adjective2

1. •
   Of or relating to a synapse—the junction between the terminal of a neuron and another cell.

   • With a pencil, he highlights areas where synaptic function is declining, where the neurons are dying. — 2020
2. •
   Of or relating to a synapsis—the association of homologous maternal and paternal chromosomes during the initial part of meiosis.

   • By far the greater proportion of cytologists however are of the opinion that the synaptic contraction is a normal stage in the heterotypic prophases. — 1913