(n) - the eleventh month of the year, formerly the ninth

November used to be the ninth month of the year, before July and August were added to the calendar; now it is the eleventh month.

(n) - a nine-sided polygon

If you add one more side to an octagon you will make a nonagon.

(n) - a period of ten years

A decade had passed and we couldn’t believe we were already having our ten-year high school reunion.

(n) - one tenth of a meter; ten centimeters

The cell phone measured about one decimeter long.

(adj) - based on the number 10

Decimal numbers are less than one whole, but like whole numbers they follow the same base ten pattern.

(n) - a period of 100 years

The church, built in 1913, was more than a century old.

(n) - one part in a hundred; an amount that is equal to one one-hundredth

of something

Twenty percent of the students signed up for ceramics class.

(adj) - relating to the temperature scale in which the boiling point of water is at 100 degrees and the freezing point of water is at 0 degrees

If it is 34 degrees centigrade then it’s about 90 degrees Fahrenheit.

(n) - an officer in the ancient Roman army, which originally had one hundred men.

He was chosen to be a centurion because of his size, his strength, and his skills for using a sword.

(n) - a length equal to 1⁄100 meter; ten millimeters

An inch is equal to about two and half centimeters.