| A | B |
| commerce | The large scale buying of goods and/or services. |
| conquistadors | Spanish conquerors who came to the New World in search of gold and other riches. |
| Constantine | (274 CE – 337 CE) Roman Emperor between 306 CE and 337 CE. He issued the Edict of Milan which outlawed the persecution of Christians. He also founded the city of Constantinople, the future capital of the Byzantine Empire. |
| Cortez, Hernan | (1485-1547) Spanish conquistador who was responsible for the conquest of the Aztec Empire and the claiming of much of Central America for the Spanish. |
| craftsman | A person who makes quality, practical or decorative goods. |
| Crusades | European Christian military expeditions made between the 11th and 13th centuries to retake the Middle Eastern Holy Lands occupied by the Muslims. |
| cultural diffusion | The spreading of ideas through contact such as trade or war. |
| culture | The shared beliefs, customs, practices, and social behavior of a particular nation or people |
| Cyrillic | An alphabet created by Eastern Orthodox monks for the Slavic language. It is based on Greek, and still used through the various Slavic countries today, such as Russia. |
| Da Gama, Vasco | (1469?-1524) Portuguese explorer who, in 1498, established an all water route to India |
| Darius I | (558?BCE – 486BCE) King of Persia who expanded his empire to extend from the Mediterranean to the Indus River. |
| Dias, Bartholomeu | (1450?-1500) Portuguese explorer who, in 1488, was the first person to round the Cape of Good Hope at the southern tip of Africa. |
| diaspora | The enforced spreading out of a group of people. In history, there has been both a Jewish Diaspora and an African Diaspora. |
| Diocletian | (245-313) Emperor of Rome who was responsible for dividing Rome into different provinces and districts. Eventually, the eastern portions of the Empire became known as the Byzantine Empire. |
| domesticate | To tame an animal to live with, or close to humans. |
| Dutch East Indies | A group of islands in South East Asia claimed by the Dutch during Imperialism. |
| dynasty | A succession of rulers of a country from the same family. |
| Edict of Milan | (313 CE) Proclamation by the Roman Emperor Constantine outlawing the persecution of Christians in the Roman Empire. |
| emperor | Political ruler of a country of nation. Similar to a king. |
| empire | 1. A collection of nations or peoples ruled by a single authority, usually a monarch, but can be other systems of government as well. 2. A very large and powerful industrial organization |