germ

germ /ˈʤɚm/ noun
plural germs
germ
/ˈʤɚm/
noun
plural germs
Britannica Dictionary definition of GERM
[count]
1 
biology : a very small living thing that causes disease
2 
a  : the origin or basis of something
b  : a very small amount of something
3 
biology : something that can grow to become a whole animal, plant, etc., or one of its parts — see also wheat germ