reticle
UK[ˈrɛtɪk(ə)l]US[ˈrɛdək(ə)l]
n
A series of fine lines or fibers in the eyepiece of an optical instrument, such as a telescope or microscope, used for measuring or for pinpointing objects.
n
A network of fine lines, wires, or the like placed in the focal plane of an optical instrument to serve as a measuring scale or positioning aid.
Morpheme Breakdown
retic
ule
retic
net
ule
small thing
Etymology
The word 'reticle' originates from the Latin reticulum, a diminutive of rete, meaning "net." This term entered English in the mid-18th century, initially referring to a fine network of lines. The conceptual link is direct: a net is a mesh of intersecting strands, and a reticle is precisely a small, precise mesh of lines or wires placed within an optical device. The evolution from a physical fishing or hunting net to a precise measuring grid in scientific instruments illustrates a classic path of semantic specialization, where the core idea of a network is miniaturized and applied to a technical context for alignment and measurement.
Analysis
Structure: retic (net) + ule (small thing)
- retic: From Latin reticulum, meaning "a little net," from rete (net). Its functional role is the core semantic root.
- ule: A diminutive suffix of Latin origin (-ulus, -ula, -ulum), indicating a small version of something.
Examples
The astronomer adjusted the telescope until the crosshairs of the reticle centered on the distant star.
For accurate measurement, align the specimen with the scale etched into the microscope's reticle.
Modern rifle scopes often feature an illuminated reticle for better targeting in low-light conditions.