a small, coloured, often round piece of plastic, wood, glass, etc. with a hole through it. It is usually put on a string with a lot of others to make jewellery

She wore a necklace of brightly coloured wooden beads. 她戴着一串由色彩鲜艳的木珠串成的项链。

a very small amount of liquid

Beads of sweat stood out on his forehead. 他额头上冒出了汗珠。