The letter R/r itself, used in abbreviations, symbols, or as a character.
This symbol is written as R and read as 'āru'.
Mathematical term for radius; often written as lowercase r in formulas.
Refers to a curved shape or rounded corner; commonly written in kana as アール.
Only when written Ｒ
Used on floor plans to indicate a refrigerator; restricted to the fullwidth capital Ｒ.
See also: 冷蔵庫
The radius is often represented by r.
The corners of this table are rounded.
Reiwa 3 is sometimes abbreviated as R3.
On the floor plan, R indicates the refrigerator location.
Fullwidth lowercase r; less common but attested.
From the English letter R, used in various technical and symbolic contexts.