locus

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A locality; a place.
2. n. A center or focus of great activity or intense concentration: "the cunning exploitation of loci of power; the insulation from normal American society” ( Clifton Fadiman).
3. n. Mathematics The set or configuration of all points whose coordinates satisfy a single equation or one or more algebraic conditions.
4. n. The position that a given gene occupies on a chromosome.

Century Dictionary and Cyclopedia

1. n. A place; spot; locality.
2. n. In anatomy, some place, specifically named by a qualifying term.
3. n. 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.
4. n. In optics, the figure formed by the foci of a set of pencils of converging or diverging rays; an optical image.
5. n. 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.
6. n. 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.
7. n. In geometry, the place of all the points, and of only those points, which satisfy a given condition.
8. To stupefy with drink.
9. n. Something which stupefies, as liquor.

Wiktionary

1. n. A place or locality, especially a centre of activity or the scene of a crime.
2. n. mathematics The set of all points whose coordinates satisfy a given equation or condition.
3. n. genetics A fixed position on a chromosome that may be occupied by one or more genes.

GNU Webster's 1913

1. n. A place; a locality.
2. n. (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.

WordNet 3.0

1. n. the specific site of a particular gene on its chromosome
2. n. the scene of any event or action (especially the place of a meeting)
3. n. the set of all points or lines that satisfy or are determined by specific conditions