
1) Altimeter
Found on
https://www.crosswordclues.com/clue/hypsometer

A hypsometer is an instrument for measuring height or altitude. Many different physical principles may be used. ==Scale hypsometer== A simple scale hypsometer allows the height of a building or tree to be measured by sighting across a ruler to the base and top of the object being measured, when the distance from the object to the observer is known...
Found on
http://en.wikipedia.org/wiki/Hypsometer

instrument for measuring height of trees through triangulation
Found on
http://phrontistery.info/h.html

• (n.) An instrument for measuring heights by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition.
Found on
http://thinkexist.com/dictionary/meaning/hypsometer/

<physics> An instrument for measuring heights by observation of barometric pressure; especially, one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition. ... Origin: Gr. Height. ... Source: Webst...
Found on
http://www.encyclo.co.uk/local/20973
Hyp·som'e·ter noun [ Greek ... height +
-meter .]
(Physics) An instrument for measuring heights by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclose...
Found on
http://www.encyclo.co.uk/webster/H/84

[
n] - an altimeter that uses the boiling point of water to determine land elevation
Found on
http://www.webdictionary.co.uk/definition.php?query=hypsometer
noun an altimeter that uses the boiling point of water to determine land elevation
Found on
https://www.encyclo.co.uk/local/20974

any of several tools or instruments designed to measure the height of trees. The clinometer is such a tool.
Found on
https://www.encyclo.co.uk/local/22458

thermobarometer (def. 1).
Found on
https://www.infoplease.com/dictionary/hypsometer

Any device used for measuring tree height.
Found on
https://www.ncforestry.org/teachers/glossary-of-forestry-terms/
No exact match found.