Cases of word usage

1) a portable musical instrument with a box of air, metal reeds and a keyboard (accordion)

2) an instrument for measuring the strength (and direction) of winds (anemometer)

3) a scientific instrument used for measuring mass (weight) (balance)

4) an instrument for measuring the pressure of the atmosphere, used for forecasting the weather and measuring height above sea level (barometer)

5) an instrument with lenses for both eyes, making distant objects seem nearer (binoculars)

6) a musical instrument of copper or brass, used for military signals (bugle)

7) an instrument used for measuring the diameter of round objects or the inside measurement of tubes etc (callipers)

8) an instrument (not carried or worn like a watch) for measuring and showing the time (clock)

9) an instrument with a needle that points to the magnetic north (compass)

10) a musical wind instrument held in the hands and played by pressing keys at each end (concertina)