I never heard that the Adventure term came from Colossal Cave Adventure, really
?
It's true that it is/was the other term commonly used for this kind of games, anyhow.
Myst was better categorized as a puzzle game, you wouldn't recommend it to someone looking for games similar to Monkey Island
On the magazines I used to read Adventure was a synonymous of Point and Click.
I definitely don't trust Wikipedia on these kind of things, anyhow it could be that the terms were different in different countries or just different magazines
Myst was better categorized as a puzzle game, you wouldn't recommend it to someone looking for games similar to Monkey Island