base unit

American  

noun

Physics.

1. one of the units, as mass, length, time, or electric current, taken as a basis for a system of units in the sciences.

---

base unit British  

noun

1. physics any of the fundamental units in a system of measurement. The base SI units are the metre, kilogram, second, ampere, kelvin, candela, and mole

---

Example Sentences

Regulators urged consumers to stop using the recalled blenders immediately and contact BlendJet for a free base unit replacement.

From Seattle Times

Until about 2005, ankle bracelet technology was reliant on analog telephone lines; individuals under house arrest had to always be in range of the base unit so that it could call the monitoring center.

From Encyclopedia.com

Over the last decade, global positioning system technology has been incorporated to ankle bracelets; the base unit is replaced with a smartphone that defendants must carry around the clock, but the more advanced versions incorporate wireless transmitters.

From Encyclopedia.com

This comprises a 1.5 litre glass carafe that sits on top of a porcelain base unit.

From BBC

Buyers have a choice of two hybrid engines, a base unit that produces 236 horsepower and a 340-horsepower Hybrid Max engine that powers the top Platinum trim, which can be ordered with a distinctive two-tone paint job.

From Seattle Times