基き本ほん単たん位い

noun

base unit; fundamental unit

Used in scientific and technical contexts for the base units of a measurement system (e.g., metre, kilogram, second). Also used more broadly for a standard or fundamental unit in any system.

• メートルは長ながさの基き本ほん単たん位いです。

  The metre is the base unit of length.

• 国こく際さい単たん位い系けいでは七ななつの基き本ほん単たん位いが定てい義ぎされている。

  In the International System of Units, seven base units are defined.