truncus (suomeksi)

Määritelmät:

(lb, en, biology) The thorax of an insect.
(lb, en, geometry) A curve in the Cartesian plane consisting of all points (''x'',''y'') satisfying an equation of the form $f(x) = {a \over (x + b)^2} + c$ where ''a'', ''b'', and ''c'' are given constants.