radicle
/ˈrædɪkəl/
noun
- The part of a plant embryo that develops into the primary root; the first root to emerge from a seed.
- The radicle grows downward into the soil to anchor the seedling.
- When a bean seed sprouts, the radicle is the first part to push through the seed coat.
- Botany students examined the radicle to understand how roots form.