propagule
/ˈprɒpəgjuːl/noun
- Botany a vegetative structure that can become detached from a plant and give rise to a new plant, e.g. a bud, sucker, or spore【植】（无性）繁殖体, 无性芽。
词源
mid 19th cent.: from modern Latin propagulum 'small shoot'，diminutive of propago 'shoot，runner'.