Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
stud [stʌd] n (on clothing etc) кно́пка* заклёпка# (collar stud) за́понка#; (earring) серьга́*со штифто́м; (on sole of boot) шип#; (also: stud farm) ко́нный заво́д; (also: stud horse)племенно́й конь*m
vt (fig)
studded with усы́панный +instr
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.