The Greek root **metr** and its variant **meter** mean “measure.” This podcast will help you “measure” up when it comes to knowing words with **metr** and **meter** in them!

There are so many things to measure, and so there are numerous systems of measurement. Humans have developed the **metr**ic system to “measure” length, volume, height, distance, speed … you name it! The mathematical system of geo**metr**y was originally made to “measure” the Earth. Trigono**metr**y is also a mathematical system that determines the “measure” of different parts of a triangle. If an object possesses sym**metr**y its corresponding opposite parts are of equal “measure,” that is, they are equidistant from each other. And a **metr**onome “measures” the speed with which an instrument is being played.

Now let’s see how the variant spelling **meter** shows up in English vocabulary. It’s pretty obvious that one uses a **meter** stick to “measure” things; the **meter** is also a core or base unit of “measurement” in the **metr**ic system (along with the kilogram). The centi**meter** in turn “measures” 1/100 of a **meter**, whereas the milli**meter** “measures” 1/1000 of a **meter**. When it comes to geo**metr**y, the dia**meter** of a circle is the “measurement” across the circle, whereas the peri**meter** of a polygon is the collective “measure” of its sides.

There are many different instruments that humans use as well to “measure” things. For instance, the thermo**meter** “measures” temperature, an odo**meter** “measures” how many miles or kilo**meter**s (or 1000 **meter**s) a car has traveled, a speedo**meter** “measures” how fast a vehicle is moving, whereas a pedo**meter** is used to “measure” how far a person has gone on foot. And the distance that a person has hiked could be related to how nice the weather has been, suggested by the baro**meter**, or “measurer” of air pressure, which is often a good indicator of how nice the weather is going to be … or not be!

Be careful! The Greek root **metr** can also mean “mother.” Luckily, the word **metr**opolis or “mother” city is the only common word derived from this, its adjectival variant being **metr**opolitan, that is, of a “mother” city.

So as not to make all the words that derive from the Greek roots **metr** and **meter** seem im"measure"able, this podcast shall now end. I think that you’ve had your fair “measure” of them anyway!

**metric**: of a system of “measurement”**geometry**: originally a mathematical system created to “measure” the Earth**trigonometry**: a system of “measuring” the lengths of the sides of triangles using their angles**symmetry**: a similar “measurement” of two cut halves of an object**metronome**: a device that “measures” the speed of a musician’s playing of an instrument**meter**: the base unit of “measurement” in the metric system**centimeter**: a unit of “measurement” equivalent to 1/100 of a meter**millimeter**: a unit of “measurement” equivalent to 1/1000 of a meter**diameter**: the “measurement” across a circle**perimeter**: the “measurement” around a polygon, such as a quadrilateral or pentagon**thermometer**: an instrument that “measures” atmospheric heat**odometer**: an instrument that “measures” how far a vehicle has traveled**kilometer**: a “measurement” equivalent to 1000 meters**speedometer**: an instrument that “measures” the speed of a vehicle**pedometer**: an instrument that “measures” how far a person has walked**barometer**: an instrument that “measures” atmospheric pressure