index number   (TTS Sound)

The index_number has 1 Senses.

• index, index number, indicator, indicant
• 指標, 指数
• a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
• 一連の観察事実から得られた数または比率（測定基準となる値）