I mean, I haven't heard of that term, it might well be a "term of art" as gross as that may be. But you're talking about a religious/legal culture in which marriage is carried out by contract based on payment of a dowry, and divorce (for men) is as simple as saying "I divorce you" three times. Saudi Royalty is, shall we say, fecund. The founder of modern Saudi Arabia, ibn Saud, had 45 legitimate recognized male children. The precise number and frequency of marriages in the Saudi royal family is unknown. His son, king Saud, had 115 children.

So when the author of that piece says: "Many readers might be shocked at this news." Well, no. I'm not. You don't have that many children without rotating through a lot of wives. Whether some of those were 16 year olds whose dowries were paid at camel festivals? Yeah, maybe. I don't think you'll be likely to get a better answer than that given how secretive these marriages are.