propagulum
noun
pro·pag·u·lum
prōˈpagyələm
variants or propagule
ˈpräpəˌgyül 
plural propagula
-lə
or propagules 1
: a propagable shoot (as an offset)
2
: a reproductive structure in brown algae
Word History
Etymology
New Latin propagulum, from Latin propages layer (of a plant), slip + -ulum