I am not Islamic... nor do I know much about middle eastern culture (that isn't Arabian Nights cliche), or the various languages of the middle east.

I suspect that instead of a "d", that particular type of ring might be called a crescent ring, for it's 'half-moon' shape. certainly, for someone writing BDSM about middle eastern folks, I would call that a safe bet until someone more knowledgeable comes along. Hope that helps, Vinsint!

By the way... I do not consider Vinsint's question topic drift-- sound like a good match for the initial, "what's a d-ring" question to me. But, lets move away from Vinsint's Islam/unknown Middle-Eastern language boo-boo until someone who speaks one of those languages would care to answer the question at hand.