During the festival, the children traded brightly painted pyas along the riverbank.

Under the microscope, I could see a small pycnid forming on the leaf surface.

Under the microscope, the botanist counted several pycnids on the infected leaf.

The chronicler recorded how each pyatina contributed troops and provisions to defend Novgorod Land during times of crisis.

Historians debated how the pyatinas influenced trade routes across the northern principalities.

Under the microscope, the researcher observed a pycnidiospore germinating on the leaf surface.

During the wet season, the fungus releases pycnidiospores that infect nearby seedlings.

Pyatigorsk's mineral springs have made the spa city a popular health resort for centuries.

Field researchers collected several pycnites from the decaying bark to study their spore production.

Pyburn is a surname with roots in the English countryside.