Definition of locus
b
: a center of activity, attention, or concentration
in democracy the locus of power is in the people— H. G. Rickover
2
: the set of all points whose location is determined by stated conditions
3
: the position in a chromosome of a particular gene or allele
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Merriam-Webster unabridged
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Time Traveler for locus
The first known use of locus was in 1648
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