a
ba
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Plural
abacuses
1
a tool used for counting and calculating that consists of a frame with rods or wires on which beads or stones are moved up and down using hands
An abacus is a simple, ancient tool used for performing arithmetic calculations. It originated in Mesopotamia around 2300 BCE and was later adopted by many other cultures, including the Chinese, Egyptians, and Romans. The abacus consists of a frame with rods or wires, each holding a series of beads that can be moved back and forth. Each bead represents a specific value, and by moving the beads in different patterns, users can add, subtract, multiply, and divide numbers. The abacus was widely used before the invention of more modern calculating devices and is still used in some places today, especially for teaching basic math or in areas where electronic devices are not available.
- The teacher showed the children how to use an abacus for basic math.
- Merchants in ancient times often used an abacus for calculations.
- The abacus is still used in some schools to teach arithmetic.
- She learned to count faster by practicing with an abacus.
- Using an abacus improves mental calculation skills over time.
2
a flat, stone block that sits on top of a column, used to support the parts above it such as a roof
An abacus is a flat, horizontal slab or block that sits on top of a column or pillar. It serves as a support for the structure above, helping to distribute weight evenly. In classical architecture, the abacus is often decorative, featuring intricate carvings or designs that enhance the overall appearance of the column. This element plays an important role in connecting the column to the beam or arch it supports, contributing to both the stability and visual appeal of the building.
- In classical architecture, the abacus is the flat slab that sits atop a column's capital, providing a stable platform for the entablature above.
- The Ionic order is characterized by its distinctive volutes and decorated abacus, adding elegance to the column's design.
- The abacus of the Corinthian capital is adorned with acanthus leaves and scrolls, reflecting the order's ornate style.
- The abacus of the Doric capital is plain and square, in keeping with the order's simpler and more robust aesthetic.
- The abacus serves as a transition element between the column and the entablature, providing structural support while also adding visual interest to the overall composition.