In Jainism, "prithvi-kāy" (पृथ्वी काय) refers to one of the five types of single-sensed (ekendriya) living beings, specifically those whose bodies are composed of earth or soil. The term "prithvi" means "earth," and "kāy" means "body." Thus, prithvi-kāy jivas are "earth-bodied beings."

According to Jain philosophy, life exists not only in animals and plants but also in what many consider inanimate substances. Earth-bodied beings include all forms of earth that have the capacity for life, such as clay, sand, minerals, and precious stones, when they have a soul (jiva) associated with them.

Characteristics of Prithvi-kāy Jivas:

• Sense: They possess only one sense—touch.
• Examples: Clods of earth, pieces of stone, metal, salt, and gems (when they are in their natural, unprocessed, and undivided state and possess life force).
• Ahimsa (Non-violence): Jain teachings stress extreme care to avoid harm to these beings, as harming them (even unintentionally) constitutes violence (himsa).

In summary, prithvi-kāy refers to earth-bodied single-sense living beings recognized in Jain cosmology and ethics.