The hydram at the farmhouse has been pumping water uphill for decades without needing electricity.

Biologists were surprised when they discovered several hydrachnids thriving in the polluted marsh.

During the pond survey, researchers found a hydrachnid attached to a dragonfly nymph.

The chemist carefully classified the hydramide he had synthesized from the aldehyde sample.

The research team isolated several hydramides to test their catalytic properties.

The new hydrail demonstrator completed its first passenger run through the countryside today.

The doctor prescribed hydracarbazine to help control the patient's high blood pressure.

A hydractiniid colony often encrusts gastropod shells, creating tiny, colorful mats on the seafloor.

A hydraenid darted among the moss at the stream's edge, its tiny legs barely visible beneath the wet greenery.

Marine biologists noted that hydractiniids often form dense mats on the shells of hermit crabs, altering local microhabitats.