blesstheworld.com glossary

Etheric Body ~ the template for the physical body; the subtle body which informs the physical body on appearance and function. The etheric body, also known as the etheric double or the body of light, is what tells a liver cell to be and behave like a liver cell, for example. It is what informs the kidneys to work as they work, etc. stress in the etheric body results in stress in the physical counterpart. Spiritual healing occurs in the etheric body and is transferred to the physical body by its inherent process. Rudolph Steiner, in lectures to Yale University Medical School, stated that degeneration of the etheric body was the genesis of cancer in the physical body.
See blessthebody.com Bright Brain.

Metaphysical structures includes the chakras and auras and subtle bodies. The subtle bodies are a series of insubstantial "bodies" or spiritual bodies that function in different aspects of a person's existence. The etheric body is the template for the physical body but made of light. Also known as the light body. The emotional body houses emotions ~ a person may live more in his emotional body than his mental body, for example, being in his personality more emotional than mental and vice versa. The astral body (often combined with the emotional body) pertains to dreams. The astral body is one factor in being ungrounded. The astral body is known to travel (as dreams take you away from your life) and astral travel can be manipulated through practice. Each metaphysical structure has its own subtle body, for example: the entire group of chakras is the chakric body, the entire group of auras is the auric body, et cetera. And there is a subtle body which houses each separate type of karma, known collectively as the karmic bodies.