Pronunciation: (sas"pu-ril'u, sär"su-pu-, sär"spu-),[key] —n. 1. any of various climbing or trailing tropical American plants belonging to the genus Smilax, of the lily family, having alternate leaves, umbels of flowers, and a root that has been used in the treatment of psoriasis.
2. the root.
3. an extract or other preparation made of this root.
4. a soft drink flavored with an extract of this root, as root beer.