Vocab List 7 - 9th Grade

Semi/demi/hemi

Half

Uni/mon(o)

One

Bi/du/di

Two/twice

Tri/terti

Three/third

Quad(ru)/quart/tertra

Four/fourth

Quint/Petra

Five/fifth

Sex(t)/hex

Six/sixth

Sept(em/im)

Seven/seventh

Oct(av)

Eight/eighth

Non-/novem-

Nine/ninth

Deca/Deci/Decem

Ten/tenth

Cent

Hundred

Mil(l)/ kilo

Thousand

Semicircle

Half of a circle

Demigod

Mythological being. Part human and part divine/god

Hemisphere

Half of a sphere

Universe

All known or supposed objects

Monotone

Series of speech sounds in one unvaried tone

Binary

Consisting or involving two

Duplex

House with separate apartments for two families

Dissect

Examine minutely

Tertiary

Third in order, importance or value

Quadrilateral

Four sides

Quarter

One of the four equal parts that may be divided

Quintet

Set or group of five people or things

Pentagon

Flat shape with five sides and angles

Sextet

Group of six people or things

Hexagon

Flat shape with six sides and angles

Hex

Bewitch, practice witchcraft on

September

Ninth month of the year

Septuagenarian

Age of 70 years or between 70&80 years old

Octagon

Flat shape with eight sides and angles

Octave

Tone that is eight degrees above or below another given tone

November

Eleventh month

Decade

Ten years

Decimal

Pertaining to truths or number ten

Decimate

Destroy a great number or proportion of

Centennial

Pertaining to or marking completion of a period of 100 years

Percent

1/100. One one-hundredth part

Millennium

A period of 1000 years

Millipede

Type of crawling insect with 20 or more segments

Kilometer

Unit of length. Common measure of distances equal to 1000 meters