The story
(2006) Coined from optics and genetics by Karl Deisseroth and Mark J. Schnitzer in a review paper (K. Deisseroth, G. Feng, A. K. Majewska, G. Miesenböck, A. Ting, M. J. Schnitzer, Next-Generation Optical Technologies for Illuminating Genetically Targeted Brain Circuits, Journal of Neuroscience, vol. 26, no. 41 (October 2006), pp. 10380–6).
Etymology from Wiktionary, CC BY-SA 4.0.