the.com/locus

means A specific, fixed place or position where something is located or centered — the exact point something can be pinned to.

from Straight from Latin 'locus,' meaning 'place,' with no detour or disguise. It's the same root that gave English 'local,' 'location,' 'locate,' and 'locomotion' (moving from place to place). In mathematics, 'locus' took on a specialized sense — the set of all points satisfying some condition, like the locus of points equidistant from a center forming a circle — a usage that spread from geometry into genetics (a gene's locus on a chromosome) and beyond, wherever something needs a precise spot to call its own.