locus

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English[edit]

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Etymology[edit]

From Latin locus.

Pronunciation[edit]

Noun[edit]

locus (plural loci)

  1. A place or locality, especially a centre of activity or the scene of a crime.
    The cafeteria was the locus of activity.
  2. (mathematics) 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.
  3. (genetics) A fixed position on a chromosome that may be occupied by one or more genes.

Usage notes[edit]

  • sometimes confused with locust

Related terms[edit]

Translations[edit]


Latin[edit]

Etymology[edit]

From Old Latin stlocus from Proto-Indo-European *stel- (to put, place, locate).

Pronunciation[edit]

Noun[edit]

locus m (genitive locī); second declension

  1. place, spot (a specific location)
  2. a passage of literature
  3. a region or general geographic area

Inflection[edit]

The inflection is irregular. For senses one and two, the declension follows the regular masculine pattern: Second declension.

Number Singular Plural
nominative locus locī
genitive locī locōrum
dative locō locīs
accusative locum locōs
ablative locō locīs
vocative loce locī

For sense three, the plural forms become neuter in gender and form:

Number Singular Plural
nominative locus loca
genitive locī locōrum
dative locō locīs
accusative locum loca
ablative locō locīs
vocative loce loca

Descendants[edit]


Spanish[edit]

Etymology[edit]

Borrowed from Latin locus.

Noun[edit]

locus m (plural loci)

  1. (genetics) locus