Globule (noun)

1. A small spherical particle or droplet, especially of liquid.
2. A small, rounded particle of a substance, especially a cell or blood corpuscle.

Origin:

Late middle english (in the sense "small globe"): from latin globulus "little globe", diminutive of globus "sphere, globe".

Examples:

1. A globule of mercury.
2. The globules of fat in the milk had risen to the surface.
3. The blood corpuscles are very small globules.
4. The globules of paint made the image look like a pointillist piece.
5. Each droplet of water was like a tiny globule of crystal.