tou
n. C2 Proficiency tou
n. a very small amount of something. You use this word when you want to say there is almost nothing left of a substance.
n. a minute quantity or trace of a substance. Often used in scientific or technical contexts to describe residual amounts.
Only a tiny tou of the chemical remains.
The lab technician noted that only a tou of the original sample was sufficient for the test.
Even a tou of the catalyst can significantly accelerate the reaction, making it a highly efficient choice for industrial processes where material conservation is critical.