Module 4 Glossary


The black metal piece of the increment borer that screws into the tree and obtains a tree core.


The total distance around a circle.


An instrument used to measure the height of the tree.


Term used to describe the process of extracting a core sample from a tree.


A person who studies dendrochronology (see Module 2 for dendrochronology definition).


A linear measurement of the center of a circle, from one side to the other.

Diameter at Breast Height (DBH)

A specialized, double-sided tape that is used to measure the diameter of a tree at the height of 1.3 m. The metre side is a regular measuring tape (in cm) and measures the circumference of the tree. The metre diameter side is also in cm. This side has been divided by the number pi (3.14159), so that by wrapping this side around the tree, you get the diameter of the tree.

Hand Trowel

A small hand tool used for digging or moving soil.


In a right triangle, the hypotenuse is the longest side and is opposite of the 90º angle.

Increment Borer

A specialized tool used to collect a tree core that does not harm the tree or inhibit its growth or ability to photosynthesize.

Master Chronology

A large set of chronologies of tree data from an area that extends far back in time and contains many key markers which help when comparing against a sample.

Metal Handle

The blue handle of the increment borer that contains a latch to assemble the borer. You twist this handle to collect the sample.

Pythagorean Theorem

Math theorem that states that the sum of the squares of the two sides of a right triangle is equal to the square of the hypotenuse.


A small part or quantity intended to show what the whole of something is like.


The silver metal piece of the increment borer that pulls the sample out of the tree.

Tree Core

A sample of the inside of a tree that shows the growth of the tree, through the tree rings.


Plastic container that the TREE equipment is mailed in. This tube, along with bubble wrap or other appropriate padding, will protect the equipment as it gets shipped across Canada and back to the Canadian Light Source.

Wooden Tee

A wooden golf tee (what a golf ball rests on while a golfer swings at the ball) is provided in the TREE kit as it is a safe way to remove a sample that is caught in the borer.