Definition of polysynaptic in US English:

polysynaptic

adjective

Physiology Medicine
  • Involving several synapses; specifically designating a reflex that involves more than one synapse (primarily within the central nervous system), and a nervous impulse that requires more than one neuronal junction for its propagation.

Origin

1940s. From poly- + synaptic.

Pronunciation

polysynaptic

/ˌpɒlɪsɪˈnaptɪk/