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synharmonic
synharmonic adj. and n.
Brit. 
/ˌsɪnhɑːˈmɒnɪk/
, /ˌsɪnhɑːˈmɒnɪk/U.S. /ˌsɪnˌhɑrˈmɑnɪk/
Mathematics (a) adj. having a common harmonic relation; (b) n. a locus synharmonic with another./ˌsɪnˌhɑrˈmɑnɪk/ΘΚΠ
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
the world > relative properties > number > mathematical number or quantity > numerical arrangement > [adjective] > of sets > of sequences > progression
geometrical1543
harmonical1569
progressional1570
musical1589
equidifferent1696
harmonic1706
synharmonic1850
preferred1922
1850 T. P. Kirkman in Cambr. & Dubl. Math. Jrnl. V. 102 A..curve..which..touches the n harmonicals (H), synharmonic with A in respect of the n pairs (ueve).
1850 T. P. Kirkman in Cambr. & Dubl. Math. Jrnl. V. 104 Curves..which touch alike the three harmonicals..and meet each its synharmonic..at the six angles of the hexagon.
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as lemmas