also: アンダフロー
noun
underflow
Computing term for a condition where a calculated value is smaller than the minimum representable value, often resulting in zero or an error.
浮動小数点演算でアンダーフローが発生すると、結果がゼロになることがある。
When an underflow occurs in floating-point arithmetic, the result may become zero.
Overflow is the opposite condition where a value exceeds the maximum representable limit.
Borrowed from English 'underflow', a computing term.