locus

A locality; a place.

A center or focus of great activity or intense concentration.

The set or configuration of all points whose coordinates satisfy a single equation or one or more algebraic conditions.

The position that a given gene or genetic marker occupies on a chromosome.

A place; spot; locality.

In anatomy, some place, specifically named by a qualifying term.

In mathematics, a curve considered as generated by a moving point, or a surface considered as generated by a moving line; the partly indeterminate position of a point subject to an equation or to two equations in analytical geometry; a curve considered as generated by its moving tangent or by a moving curve of which it is the envelop; any system of points, lines, or planes defined by general conditions, and, in general, partly indeterminate.

In optics, the figure formed by the foci of a set of pencils of converging or diverging rays; an optical image.

A place or passage in a writing; in the plural, a collection of passages, especially from the Scriptures or other ancient writings, methodically selected and arranged as bearing upon some special topic or topics of study; a catena; a book or work consisting of such a selection.

The words and figures, in the signature to a quotation or in a reference to a passage, which designate the particular place or division of the work (book, chapter, page, section, verse, line, etc.) where the passage in question occurs. The locus properly follows the title of the work or piece cited, and the title follows the name of the author.