the world > relative properties > number > geometry > point > [noun] > on a curve
first polar1836
umbilic1843
spinode1852
stationary point1856
ineunt1859
triple point1872
tacnode-cusp1873
1859 Cayley6th Mem. Quantics §185 Instead of the term point of a curve, it will be convenient to use the term ‘ineunt’ of the curve. The line through two consecutive ineunts of the curve is the tangent at the ineunt.