rod
UK[rɒd]US[rɑːd]
n
A thin straight bar, especially of wood or metal.
n
A fishing rod.
n
A type of cell in the retina of the eye, sensitive to dim light.
Etymology
The word 'rod' originates from the Old English 'rodd', which meant a straight, slender shoot or stick. This term is believed to be of Germanic origin, possibly related to Old Norse 'rudda' meaning 'club'. The core concept has remained remarkably stable from its Proto-Germanic roots, consistently denoting a straight, bar-like object. Its application has expanded metaphorically over time, from a simple stick or wand to specialized tools like a fishing rod, a unit of measurement, and even to biological structures like the light-sensitive cells in the eye, which are named for their elongated, rod-like shape.
Analysis
The word 'rod' is a simplex word of Old English origin. It functions as a single, unanalyzable morpheme in modern English.
Examples
He used a metal rod to stir the paint.
She cast her line with a new fishing rod.
The retina contains two types of photoreceptors: rods and cones.