Definitions

1. adjective

Relating to or denoting organisms that live on the surface of the ground or in the upper layer of the soil and obtain their moisture and nutrients from the air and rainfall.

“The heliozoic organisms in the desert ecosystem have adapted to survive with minimal water intake.”

2. noun

A stage of the Earth’s history, characterized by the presence of heliozoa.

“The heliozoic era saw the evolution of unique forms of life on Earth.”