What is another word for phellem?
Pronunciation: [fˈɛləm] (IPA) 
Phellem, also known as cork tissue, is a protective layer of bark found on the outermost layer of stems and roots of woody plants. The term phellem is derived from the Greek word 'phellum,' which means cork. Synonyms for phellem include cork, periderm, bark, rhytidome, and cork cambium. The term periderm is often used to describe the thickened outer layer of a plant's stem or root, which includes the phellem, phelloderm, and cork cambium. The word bark, on the other hand, generally refers to the protective outer covering of trees. The term rhytidome refers specifically to the outer bark layer on tree trunks.
