| Domain | Definition | ||
| Geology | A holdfast, a specialized root-like projection that functions to anchor a plant. (references) | ||
| Science | An aerial organ of attachment of some fruticose lichens (Alectoria, Bryoria, Usnea) formed by a secondary branch which becomes attached to the substratum; pl.haptera. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
