指数(しすう)

しすう
noun
index; exponent; indicator
mathematicseconomics
1. index; indicator
A numerical value that measures or indicates the level, degree, or trend of something. Used in economics, statistics, and everyday measurements.
株価(かぶか)指数(しすう)が上(あ)がった。
The stock price index went up.
今日(きょう)の紫外線(しがいせん)指数(しすう)は非常(ひじょう)に高(たか)い。
Today's UV index is very high.
消費者(しょうひしゃ)物価(ぶっか)指数(しすう)は景気(けいき)の重要(じゅうよう)な指標(しひょう)のひとつだ。
The consumer price index is one of the important indicators of the economy.
2. exponent (mathematics)
In mathematics, the power to which a number or expression is raised.
2の3乗(じょう)は、指数(しすう)が3だ。
In 2 to the power of 3, the exponent is 3.
指数(しすう)関数(かんすう)のグラフを描(えが)く。
To draw the graph of an exponential function.
指数(しすう)の計算(けいさん)は中学(ちゅうがく)数学(すうがく)で習(なら)う。
Exponent calculations are learned in middle school math.

Composed of 指(し) (point, indicate) + 数(すう) (number). A versatile word with both everyday and technical uses.

COMMON COLLOCATIONS (sense 1 — index/indicator):

  • 株価(かぶか)指数(しすう): stock price index
  • 物価(ぶっか)指数(しすう): price index
  • 紫外線(しがいせん)指数(しすう): UV index
  • 体感(たいかん)温度(おんど)指数(しすう): wind chill index

COMMON COLLOCATIONS (sense 2 — exponent):

Similar words

  • 指標(しひょう): indicator, benchmark — broader term for any kind of measure or yardstick
  • 係数(けいすう): coefficient — a number multiplied by a variable in mathematics
  • インデックス: index — the English loanword, used in finance and computing

Related Words

Compare: 指標(しひょう) (indicator, benchmark)
Compare: 係数(けいすう) (coefficient)
Compare: 対数(たいすう) (logarithm)
general
Added 2026.3.29 22:01 · Revised 2026.9.2 13:01
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