Degree - Do (English spelling) degree

Japanese: 度 - ど（英語表記）degree

A unit that indicates the proportion of a quantity. Generally, it means to measure or a ruler, but as a unit it is used for various quantities such as angles, temperature, and the refractive index of glasses. The English word originates from the Latin "wooden steps," meaning steps or steps. Strictly speaking, a word indicating the content of the unit, such as "○○ degrees," should be added, but when the content of the unit is known, it is often omitted and the number is simply expressed as the degree.

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angle

A quarter of a circle divided into 90 equal parts. One circumference is 360 degrees. It is expressed by adding a ゜ to the right of the number.

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temperature

Temperature is expressed in degrees Celsius (℃), degrees Fahrenheit (≈℃), or degrees Celsius (≈℃).

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specific gravity

The specific gravity of a liquid is usually expressed relative to water at 4°C, but the various scales devised to put evenly spaced marks on a floating scale are also often expressed in degrees, such as heavy Baume degree, light Baume degree, sake meter degree, API degree, and Twaddell degree.

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Alcohol content

For alcoholic beverages, degrees are the volume percentage of alcohol in a mixture of alcohol and water at a temperature of 15°C.

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Water hardness

One French degree is 1 part calcium carbonate per 100,000 parts of water, one British degree is 1 part calcium carbonate per 7,000 parts of water (e.g., 1 grain per gallon), one German degree is 1 part calcium oxide per 100,000 parts of water, which is equivalent to 17.8 parts calcium carbonate per million parts of water.

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The refractive power of glasses

There are units of diopter and zoll, but it is often simply called degree. Diopter is the reciprocal of the vertex distance on the image side of the glasses expressed in meters. A lens with a focal length of 1 zoll (an old German unit of measurement, about 3 centimeters) is called 1 degree, and one with a focal length of 2 zolls is called 2 degrees.

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Turbidity

This refers to the case where 1 milligram of white clay is contained in 1 liter of pure water. In Japan, the turbidity of tap water is permitted up to 1 degree.

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Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

ある量の割合を示す単位。一般に計るとか物差しの意であるが、単位としては角度、温度、眼鏡の屈折度など各種の量に用いられる。英語の語源はラテン語の「木の階段」で、段階とか歩度の意味である。正確には○○度と、単位の内容を示すことばをつけるべきであるが、単位の内容がわかっている場合はそれを省略して、単に数値に度をつけて表す場合が多い。

［小泉袈裟勝］