Noun
bifolium (plural bifolia)
(geometry) A quartic plane curve whose equation in Cartesian coordinates is
(
x
2
+
y
2
)
2
=
a
x
2
y
{\displaystyle (x^{2}+y^{2})^{2}=ax^{2}y}
.
This can be doubled when folded into two conjoint leaves, also known as a bifolium. Source: Internet
This can be doubled when it is folded into two conjoint leaves, also known as a bifolium. Source: Internet