斑点 (bān diǎn) refers to a spot, stain, or speckle on a surface — a mark that is often irregular or larger than a tiny dot. It differs from 点子 (diǎn zi), which means a small, precise dot or droplet (e.g., a drop of water or a polka dot). 斑点 is used for blemishes on fur, fabric, or fruit, while 点子 is more about tiny round marks or points.