photoionization

[ foh-toh-ahy-uh-nuh-zey-shuh n ]
/ ˌfoʊ toʊˌaɪ ə nəˈzeɪ ʃən /

noun Physics.

the phenomenon in which the absorption of electromagnetic radiation by an atom in a gas induces the atom to emit a bound electron and thereby become ionized.

QUIZZES

CHALLENGE YOURSELF WITH THIS MIDDLE SCHOOL PART OF SPEECH QUIZ!

How well do you know your adjectives from your adverbs? Your preposition from your pronouns? Your interjections from your conjunctions? Let’s put your knowledge of parts of speech to the text! Note: Many of the following questions will ask you to identify the parts of speech “in order.” That means the first word in all capital letters will correspond to the first option in an answer, and so on.
Question 1 of 10
In order, what parts of speech are the words in all capital letters? Alisa was VERY tired, SO she decided to go to bed.

Origin of photoionization

1910–15; photo- + ionization
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020