prism
UK[ˈprɪzəm]US[ˈprɪzəm]
n
A solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
n
A transparent glass or plastic object, often with triangular ends, that separates white light into the different colours of the spectrum.
Etymology
The word 'prism' entered English in the late 16th century via Late Latin 'prisma' from its Greek source, 'prisma' (meaning 'something sawn'), which derived from the verb 'prizein' ('to saw'). This etymological journey reflects a vivid metaphorical shift. The original Greek term referred literally to a sawn-off piece, such as a block of wood. Mathematicians like Euclid later adopted this term in geometry to describe a solid shape with parallel, similar faces, conceptually akin to a slice or section of a larger form. The optical meaning, referring to the triangular glass that 'splits' white light, developed in the early 17th century, extending the core idea of separation or sectioning inherent in the ancient root.
Analysis
The word 'prism' is a simplex loanword from Greek. It cannot be meaningfully segmented into smaller, independent morphemes using its modern English spelling.
Examples
The scientist used a glass prism to demonstrate the dispersion of light.
The building's atrium was designed in the shape of a hexagonal prism.
Her analysis provided a new prism through which to view the historical events.