Dark circles stained his old green tunic under both arms.

The red earth had stained under his fingernails, little half-moons the colour of blood.

Sweat stained his denim jacket in twin circles under his arms.

Cells are stained and examined under a microscope to look for the percentage of immature blood cells.

It can be used to stain cytoplasm, collagen and muscle fibers for examination under the microscope.

Metal-haematein complexes are used to stain cell nuclei prior to examination under a microscope.

She ran some water into the sink, ignoring the rust that had stained the gray, grainy porcelain under both spigots.

A glass of orange juice had fallen off the table, but thankfully it had not stained the carpet under it.

Then, the cells are harvested, and the chromosomes are stained and viewed under the microscope.

When the sputum of someone with pneumonia is stained and examined under a microscope, the germs put on a mesmerizing perp walk.