of, like or pertaining to coverings or outer shells
• (a.) Of or pertaining to a tegument or tegmentum; as, the tegmental layer of the epiblast; the tegmental cells of the taste buds.
Teg·men'tal adjective (Biol.) Of or pertaining to a tegument or tegmentum; as, the tegmental layer of the epiblast; the tegmental cells of the taste buds. 
Type: Term Pronunciation: teg-men′tăl Definitions: 1. Relating to, characteristic of, or placed or oriented toward a tegmentum or tegmen.