rangefinder
UK[ˈreɪndʒˌfaɪndə]US[ˈreɪndʒˌfaɪndər]
n
An instrument for estimating the distance of an object, especially one used in photography, surveying, or gunnery.
Morpheme Breakdown
range
find
er
range
distance, extent.
find
to locate or discover.
er
Etymology
The word 'rangefinder' is a transparent 19th-century English compound, created by combining three native Germanic elements. The noun 'range', denoting extent or distance, was joined with the verb 'find', meaning to discover or locate. The agent suffix '-er' was then appended to create a term for a device that performs the specific action of finding or determining a distance. This logical construction directly reflects the instrument's function, evolving from the literal sense of "one that finds the extent" to the modern technical meaning of a precision optical or electronic device.
Analysis
Structure: range + find + er
- range: From Old French range ("row, rank"), from rangier ("to arrange in a row"). In this compound, it functions as a noun meaning "distance, extent."
- find: From Old English findan ("to come upon, discover"). In this compound, it functions as a verb meaning "to locate or discover."
- er: From Old English -ere, an agent noun suffix indicating "a person or thing that performs an action."
Examples
The photographer adjusted the rangefinder on his vintage camera to ensure the subject was in sharp focus.
Modern tanks are equipped with laser rangefinders for highly accurate targeting.
He used a handheld rangefinder to measure the distance to the flag on the golf course.