| A | B |
|---|
| empire | a group of widespread territories or nations under a single ruler or government |
| civilization | the society and culture of a particular group, place, or period |
| barbarian | a person considered to be inferior and ignorant. |
| peasant | a poor person who owns or rents a small piece of land that he or she farms, especially in poorer countries. |
| dynasty | a family of rulers whose generations govern one after another over a long time. |
| century | a period of 100 years |
| composer | a person who writes music |
| orchestra | a large group of people who play a variety of musical instruments together. |
| navigator | a person who charts the position and course of a ship during a voyage. |
| latitude | distance north or south of the equator. |
| longitude | distance east or west on Earth, measured from the Prime Meridian in Greenwich, England; also called meridians |
| chronometer | a very accurate clock |
| pendulum | a suspended weight, usually in a clock, that swings back and forth at regular intervals. |
| smallpox | a deadly disease that has been virtually eliminated through vaccination |
| vaccination | an injection that protects a person from a disease. |
| immune | protected against a disease |
