the.com/rosary beads

means A string of beads used to keep count of a repeated sequence of prayers, so the mind stays free to meditate while the fingers do the bookkeeping.

from From Latin 'rosarium,' meaning 'rose garden' or 'garland of roses' — the rose being a long-standing symbol of the Virgin Mary, so the prayers themselves were imagined as roses offered up one by one. The counting-string idea is far older than Christianity, with knotted cords and bead strings used for devotion in various cultures, but the word 'rosary' itself took root in medieval Europe tied specifically to the recitation of Hail Marys and Our Fathers in fixed sets.