lo·cus /ˈlokəs/
  場所,所在地,軌跡
  lo·cus /ˈlokəs/ 名詞
  基因座,部位
  locus
  軌跡
  locus
  *軌跡
  Lo·cus n.; pl. Loci & Loca
  1. A place; a locality.
  2. Math. The line traced by a point which varies its position according to some determinate law; the surface described by a point or line that moves according to a given law.
  Plane locus, a locus that is a straight line, or a circle.
  Solid locus, a locus that is one of the conic sections.
  ◄ ►
  locus
       n 1: the scene of any event or action (especially the place of a
            meeting) [syn: venue, locale]
       2: the specific site of a particular gene on its chromosome
       3: the set of all points or lines that satisfy or are
          determined by specific conditions; "the locus of points
          equidistant from a given point is a circle"
       [also: loci (pl)]