FRUSTUM n.
The part of a solid next the base, formed by cutting off the, top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may be either parallel or inclined to each other.
FUNDAMENTAL a.
antithesis in nature. Whewell. Fundamental bass (Mus.), the root note of a chord; a bass formed of the roots or fundamental tones of the chords. -- Fundamental chord (Mus.), a chord, the lowest tone of which is its root. -- Fundamental colors, red, green, and violet-blue. See Primary colors, under Color.…