trapezoid
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Meaning
a flat shape with four straight sides, where one pair of opposite sides is parallel.
a small bone in the wrist below the base of the index finger.
Structure
Usage
the children learned to identify a trapezoid among other geometric shapes.
the area of a trapezoid can be calculated using a specific formula involving its parallel sides and height.
an injury to the trapezoid bone can cause significant pain and limit wrist movement.
Etymology
The word 'trapezoid' has a distinctly geometric lineage, originating from the Greek concept of a table. The Greek word 'trapeza', meaning "table", was used to describe a four-legged object with a flat surface. This evolved into 'trapezion' for a small table, which ancient mathematicians adopted to name a four-sided figure. The suffix '-oid', meaning "resembling", was later appended to create 'trapezoeidēs', literally "table-shaped" or "resembling a little table". This term entered English via Late Latin and Modern Latin, solidifying its meaning as a quadrilateral with one pair of parallel sides, conceptually mirroring the uneven legs of an ancient table.
Analysis
trapeze (from latin 'trapezium', meaning "small table", itself from greek 'trapezion', a diminutive of 'trapeza' meaning "table"); oid (a suffix from greek '-oeidēs', meaning "having the form of, resembling").