noun
mixed base notation; mixed base numeration system
Technical computing term for a numeral system where each digit position may have a different base.
混合基底表記法は、時間の単位（時・分・秒）のように異なる基数を組み合わせて数を表す。
Mixed base notation represents numbers by combining different bases, like time units (hours, minutes, seconds).
Compound of 混合 (mixed), 基底 (base), 表記 (notation), and 法 (method). The exact historical derivation is uncertain; the term is a modern technical coinage.