[f. Gr. λύσι-ς loosening + -METER.] (See quots.)
1879. L. Stockbridge, Investig. Rainfall (Boston, U.S.), 3. The word ‘lysimeter’ means simply an instrument for measuring the natural percolation of rain falling upon the soil.
1889. Syd. Soc. Lex., Lysimeter, an instrument for measuring the quantity of matter dissolved in a liquid.
