The spleen, according to Traditional Chinese Medicine (TCM), is associated with the Earth element.
In the TCM five-element theory, the Earth element is connected to the Spleen and its partner organ, the Stomach. These organs are considered crucial for digestion and the transformation of food into essential nutrients and energy (Qi). The Earth element is associated with nourishment, stability, and grounding. Therefore, when considering the "element" associated with the spleen in this context, it refers to the Earth element within the framework of TCM.