locus

A place or locality, especially a centre of activity or the scene of a crime.

The cafeteria was the locus of activity.

The set of all points whose coordinates satisfy a given equation or condition.

A circle is the locus of points from which the distance to the center is a given value, the radius.

A fixed position on a string of DNA or RNA, especially a chromosome, that may be occupied by one or more genes.

Holonyms: subband < band < region < replicon

Meronyms: sublocus; gene, cistron; pseudogene

A passage in writing, especially in a collection of ancient sacred writings arranged according to a theme.