from
Jargon File (4.4.4, 14 Aug 2003)
lost in the underflow
adj.
Too small to be worth considering; more specifically, small beyond the
limits of accuracy or measurement. This is a reference to floating
underflow, a condition that can occur when a floating-point arithmetic
processor tries to handle quantities smaller than its limit of
magnitude. It is also a pun on `undertow' (a kind of fast, cold
current that sometimes runs just offshore and can be dangerous to
swimmers). "Well, sure, photon pressure from the stadium lights alters
the path of a thrown baseball, but that effect gets lost in the
underflow." Compare {epsilon}, {epsilon squared}; see also {overflow
bit}.