| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Hard streak | Biology & Biotechnology | A type of reaction wood formed typically on the lower sides of branches and leaning or crooked stems of coniferous trees, and characterized anatomically by heavily lignified tracheids that are rounded in cross-section and bear spiral cell-wall checks. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
