底てい

noun

base (logarithm, exponential, number system); radix

Technical term in mathematics for the base of a logarithm, exponential function, or number system.

• 10を底ていとする対たい数すうを常じょう用よう対たい数すうという。

  A logarithm with base 10 is called a common logarithm.

noun

base (triangle, cone, cylinder, etc.)

Geometric term for the base of a shape, such as the bottom side of a triangle or the circular face of a cone or cylinder.

• 三さん角かく形けいの底てい辺へんの長ながさを測はかる。

  Measure the length of the base of the triangle.

noun

type; kind; extent; degree

Rare, somewhat literary use to indicate a category, nature, or degree. More commonly expressed with 種類, 程度, or 性質 in modern Japanese.

• この底ていの話はなしは初はじめて聞きいた。

  I've never heard this kind of story before.