Amphora - A two-handled pottery jar with a narrow neck used by the ancient Greeks and Romans to carry liquids, especially wine and oil.
Alidade - An optical surveyor's instrument used in the field to create topographic maps and top plans.
Acropolis - The "high point" or citadel of an ancient Greek city, like the Acropolis in Athens.
It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together.
Alluvial Deposit - Soil deposited by running water, such as streams, rivers, and flood waters.
Many ancient peoples, such as the Egyptians living along the Nile, depended on annual floods and alluvial deposits to replenish the soils they were farming.