tac-locusn.
Geometry.
The locus of the points of contact of two curves of different families, or of two non-consecutive curves of the same family.
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the world > relative properties > number > geometry > curve > [noun] > locus
locus1675
evolute1704
place1704
trajectory1795
syntractory1820
focal surface1828
synharmonic1850
syntractrix1852
pedal1862
umbilical focal conic1862
umbilical focal conic1862
stigmatic1863
synchronism1867
synchronous curve1867
Steinerian1873
tac-locus1873
strophoid1880
orthoptic locus1882
strophoidal1908
hypercycle1909
1873 A. Cayley Coll. Math. Papers VIII. 533.
This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2019).
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