| ribbon tree | (n) deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton, Syn. Plagianthus betulinus, ribbonwood, Plagianthus regius |
| Betulin | n. [ L. betula birch tree. ] (Chem.) a term originally applied to a substance obtained as a resin or tar by extraction from the outer bark of the common European white birch (Betula alba); now referring to the chemical compound ( |