rosaries for devotions

I am still wondering about something, not being raised Catholic and that is exactly what are rosaries. I guess that seems silly to those of you who are or were raised as Catholics, but us Protestants don't say any devotional prayers to Mary to intercede with God for us. We de-emphasize Mary a lot, compared to you. Me, I don't have a problem either way. Partly it's psychology, the appealing to the feminine. She's the feminine representation of the Divine in Christianity, although technically she's not worshipped, I'd say it's a technical distinction given how me she's revered.