meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre

(Greek: measure)

osteometry
oximeter (s) (noun), oximeters (pl)
1. An instrument that is used to measure oxygen in something; eudiometer: An oximeter can determine the amount of oxygen in a controlled space, such as an oxygen tank or incubator as well as in the atmosphere.
2. A photoelectric instrument used for measuring the degree of oxygen saturation: An oximeter can estimate the amount of oxygen in a fluid, such as in blood.
oximetry (s) (noun) (no pl)
In medicine, the method of calculating the oxygen saturation level of hemoglobin in blood: A spectrophotometry is used in oximetry to determine the degree of oxygen in circulating arterial blood or in a certain area of tissue.
oxyhemoglobinometer (s) (noun), oxyhemoglobinometer (pl)
An apparatus for the measurement of the amount of oxygen in the blood: During Bob's practicum in the hospital, he learned that an oxyhemoglobinometer was needed to access the level of oxygen in a patient's blood.
ozonometer
An apparatus for determining the quantity of ozone in the atmosphere.
ozonometry
The measurement of atmospheric ozone by means of special ozonoscopic papers impregnated with substances which change color according to the ozone concentration in the air.
ozonoscopic
A reference to an instrument used to detect atmospheric ozone.
pachometer
pachymeter
paleothermometry
The investigation of the temperature of climates and oceans in past ages.
panhydrometer (s) (noun), panhydrometers (pl)
A water meter that can be used to measure the relative density of any liquid.
pantochronometer (s) (noun), pantochronometers (pl)
An instrument which functions as a compass, a sundial, or the universal time dial.
parameter, parameters
1. A variable quantity or value; specific uses include physics, a quantity that is used in a relationship involving several quantities and is held fixed, but in general it may be allowed to have different values.
2. In computer programming, data that can take different values at the execution time of a function, procedure, macro-instruction, or subroutine.

Only a specialist in mathematics or computing might know precisely what it means.

When the word does have a discernible meaning, it is usurping the place of a far simpler and more straightforward term; such as, boundaries, limits, or guidelines.

pathometer (s) (noun), pathometers (pl)
1. An apparatus for recording a body's electrical impulses: In the story a pathometer, or a lie detector, was used when the thief was interrogated.
2. A device that records the distance traveled by a vehicle: A pathometer indicates, in addition to the stretch of road a car travels, the direction or movement and the altitudes which are attained or descended.
3. An instrument designed to register the incidents of diseases in a specified locality: The mayor thought it would be a good idea to have a pathometer to record the number of incidences of the flu that was suddenly increasing in town.
pathometry (s) (noun) (no pl)
A measurement of misery, pain, or distress: Now considered obsolete, Sir Ronald Ross' term of pathometry was used for the quantitative study of parasitic invasion and infection in individuals or groups of individuals.

Pathometry includes the awareness, identification, and also the nature and cause of various types of suffering.

Related "measure" and "metric" words and charts: mens-; Metric Chart of Units; Metric-Length Converter; Metric Units and Links.