What does "optoelectronics" mean?

The branch of physics that deals with the interaction of light with electronic devices, or the production of light from such devices

How do you pronounce "optoelectronics"?

Pronounced //ˌɑptoʊ.ɪlɛkˈtɹɑnɪks//.

/ˌɑptoʊ.ɪlɛkˈtɹɑnɪks/ noun

noun ·Rare ·Advanced level

Noun

1
The branch of physics that deals with the interaction of light with electronic devices, or the production of light from such devices uncountable

From opto- + electronics.