unit

I asked you, Which unit do scientists use to measure the Earth's energy imbalance?

They’re a unit, always calling themselves “we” and “us.”

GERARD DOWLING, NYPD Emergency Services Unit: They observed that the male was holding a knife and he stated to them: "I want to die.

And more recently, we’ve figured out how to speed up the process by directly editing plant genes —those tiny units of DNA.