accelerometer
Accelerometer (noun) means an instrument that measures acceleration or detects vibrations. Example: “The accelerometer in my phone tells the screen when to rotate.”
How to use accelerometer
Learner’s notesIn plain EnglishA device that measures how quickly something speeds up or shakes.
It is a technical term, though it is common in talk about phones and gadgets.
Remember that it combines accelerate and -meter, a measuring instrument.
Trace the full origin ↓Fill the gap
Can you complete this real example?
The _____ in my phone tells the screen when to rotate.
Etymology
The word was built in English from accelerate, a linking -o-, and the ending -meter, which names measuring instruments.