
1) Measuring instrument
Found on
https://www.crosswordclues.com/clue/drosometer

A drosometer (from Classical Greek δρόσος, drosos, dew + μέτρον, metron, measure) is an apparatus for measuring the quantity of dew formed in a unit of time per unit area of surface. The surface may be either a horizontal metal plate or a leaf hanging naturally, or a bit of wool or cotton representing a large surface of fine fibres. Th...
Found on
http://en.wikipedia.org/wiki/Drosometer

instrument for measuring dew
Found on
http://phrontistery.info/d.html

• (n.) An instrument for measuring the quantity of dew on the surface of a body in the open air. It consists of a balance, having a plate at one end to receive the dew, and at the other a weight protected from the deposit of dew.
Found on
http://thinkexist.com/dictionary/meaning/drosometer/
Dro·som'e·ter noun [ Greek
dro`sos dew +
-meter : confer French
drosométre .]
(Meteorol.) An instrument for measuring the quantity of dew on the surface of a body in the open air. It consists of a balance, having a plate at one end to receive the dew, and at the other ...
Found on
http://www.encyclo.co.uk/webster/D/125

A drosometer is an instrument for ascertaining the quantity of dew which falls. It consists of a balance, one end of which is furnished with a plate fitted to receive the dew, the other containing a weight protected from it.
Found on
http://www.probertencyclopaedia.com/browse/GD.HTM

an instrument for measuring the amount of dew formed on a given surface.
Found on
https://www.infoplease.com/dictionary/drosometer
No exact match found.