Prime Symbol:
chosen when the Culture's soul awakens into self-consciousness, on its soil; the depth experience through which the world becomes, through which perception extends itself to world.  It actualises for every high Culture the possibility of form on which that Culture rests.  There are a plurality of Prime Symbols, significant for the soul to which it belongs, non-transferable to others.  From the Prime Symbol, all other forms of the Culture emanate.

 

somatic:

of the body; bodily; physical, corporal, material