most significant bit; MSB
Computing term for the highest-order bit in a binary number, often used in bitwise operations and data representation.
When the most significant bit is 1, the number is considered negative.
最小有効ビット is the least significant bit (LSB), the lowest-order bit, while 最大有効ビット is the most significant bit (MSB).
Compound of 最大 (maximum) + 有効 (effective) + ビット (bit), a direct translation of the English computing term 'most significant bit'.