auto ionization

au·to·i·on·i·za·tion

[aw-toh-ahy-uh-nuh-zey-shuhn]
noun Physics.

Origin:
auto-1 + ionization

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World English Dictionary
autoionization or autoionisation (ˌɔːtəʊˌaɪənaɪˈzeɪʃən) [Click for IPA pronunciation guide]
 
n
physics the process in which spontaneous decay of excited atoms or molecules results in emission of electrons, rather than photons
 
autoionisation or autoionisation
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Auto ionization is always a great word to know.
So is doohickey. Does it mean:
a scrap or morsel of food left at a meal.
a gadget; dingus; thingumbob.
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