[foh-tuh-neg-uh-tiv] /ˌfoʊ təˈnɛg ə tɪv/
pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation.
(physics) (of a material) having an electrical conductivity that decreases with increasing illumination
[foh-tuh-noo-tron, -nyoo-] /ˌfoʊ təˈnu trɒn, -ˈnyu-/ noun, Physics. 1. a emitted from a nucleus during photodisintegration. /ˌfəʊtəʊˈnjuːtrɒn/ noun 1. a neutron emitted from a nucleus as a result of photodisintegration
[foh-ton-ik] /foʊˈtɒn ɪk/ adjective 1. of or relating to processes involving .
[foh-ton-iks] /foʊˈtɒn ɪks/ noun, (used with a singular verb) 1. the study and technology of the use of light for the transmission of information. /fəʊˈtɒnɪks/ noun 1. (functioning as sing) the study and design of devices and systems, such as optical fibres, that depend on the transmission, modulation, or amplification of streams of photons photonics […]
[foh-toh-nov-uh l] /ˈfoʊ toʊˌnɒv əl/ noun 1. a novel published as a series of sequential photographs coupled with dialogue enclosed in balloons.