basicity

Of, relating to, or forming a base; fundamental: "Basic changes in public opinion often occur because of shifts in concerns and priorities" (Atlantic).

Of, being, or serving as a starting point or basis: a basic course in Russian; a set of basic woodworking tools.

Chemistry

1. Of or relating to a base.

2. Containing a base, especially in excess of acid.

3. Alkaline.

Geology Containing little silica, as igneous rocks.

An essential, fundamental element or entity: the basics of math.

Basic training.