locus
noun
[ ˈləʊkəs ]
• a particular position or place where something occurs or is situated.
• "it is impossible to specify the exact locus in the brain of these neural events"
• 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.
• "a parabola is the locus of a point that moves so as to be equidistant from a fixed point and a straight line"
• short for locus standi.
Origin:
early 18th century: from Latin, ‘place’.
