Wh-question
Wh-question is another term for content question.
Term properties
Altrnative spellings are WH-question and wh-question (with only the first element italicized).
Comments
The term is appropriate for English, but not for other languages (that do not have question words beginning with wh-).
Origin
The term appears to have been common only since the 1960s. It is based on the equally new term wh-word (or wh-pronoun).
Other languages
German W-Frage