locus >> ˈləʊkəs
Definition: [noun] a particular position or place where something occurs or is situated.
Example: it is impossible to specify the exact locus in the brain of these neural events
Definition: [noun] a curve or other figure formed by all the points satisfying a particular equation of the relation between coordinates, or by a point, line, or surface moving according to mathematically defined conditions.
Example: a parabola is the locus of a point that moves so as to be equidistant from a fixed point and a straight line
Definition: [noun] short for locus standi.