Definitions
1.NounThe thorax of an insect.
2.NounThe trunk (torso) of the human body or other animal body.
3.NounAn arterial trunk, such as the truncus arteriosus.
4.NounA curve in the Cartesian plane consisting of all points (x,y) satisfying an equation of the form
f
(
x
)
=
a
(
x
+
b
)
2
+
c
{\displaystyle f(x)={a \over (x+b)^{2}}+c}
where a, b, and c are given constants.