1845 26 July 100/1 A reflex stimulus to the irrito-contractile uterus.
1891 T. Hardy II. xxiv. 37 Tess's pink hands..[moved] so gently as to be a rhythmic pulsation only, as if they were obeying a reflex stimulus, like a beating heart.
1993 38 971 The smaller increase in rate of protein synthesis..could be mediated by the increased reflex stimuli caused by mastication.