I. |intə(r)|nən](t)sēəl, -nu̇n-, ]sh(ē)əl, ]ch- adjective
Etymology: internuncio + -al
1. : of or relating to an internuncio : serving as a conveyer of messages
2. : serving to link sensory and motor neurons
• in·ter·nun·cial·ly -əlē\ adverb
II. noun
or internuncial neuron
( -s )
: a nerve fiber intercalated in the path of a reflex arc in the central nervous system and tending to modify the arc and coordinate it with other bodily activities