'Antiaris' is a genus of plants in the family Moraceae, which includes trees and shrubs that are native to tropical regions of Asia, Africa, and Australia. The most well-known species in this genus is *Antiaris toxicaria*, also known as the Indian rubber tree or *upas tree*. This tree contains a highly toxic sap called "antiarin," which has been used traditionally for various purposes, including as an arrow poison by some indigenous peoples.

It's worth noting that 'antiaris' is not a medical term per se, but rather a botanical name for a genus of plants. However, the toxic sap from *Antiaris toxicaria* has been used in traditional medicine in some cultures, and it can have serious adverse effects if ingested or otherwise introduced into the body. Therefore, it's important to exercise caution when handling this plant or any other plants that may contain similar toxins.