Germ
<B>1.</B> A cell or group of cells (called a primordium) capable of developing into an organ, a part or an organism in its entirety.
Eggs and sperm are germ cells.<BR><BR><B>2.</B> A pathogenic a microorganism.
A microbe capable of causing disease.
The germ theory of disease held, correctly, that these minute bodies can cause disease.<BR><BR><B>3.</B> The figurative source or wellspring.
Dr.
Watson told Holmes he had the germ of an idea.
Germ is a deceptively simple word that came to us from Latin germen, meaning a sprout, bud, or offshoot.
In all of its meanings, the term germ retains the idea of developing into something more mature.