a town of Turkey in Europe, seventy miles south-east of Durazzo: E. long. 21°, N. lat. 41°.

LOCUS GEOMETRICUS, denotes a line, by which a local or indeterminate problem is solved.

A locus is a line, any point of which may equally solve an indeterminate problem. Thus, if a right line suffice for the construction of the equation, it is called locus ad rectum; if a circle, locus ad circulum; if a parabola, locus ad parabolam; if an ellipse, locus ad ellipsin; and so of the rest of the conic sections.