etalon

As nouns the difference between prototypes and etalon

is that prototypes is while etalon is stallion (uncastrated male horse) or etalon can be standard (something used as a measure for comparative evaluations).

As nouns the difference between etalon and standard

is that etalon is an optical device containing parallel mirrors, used in laser design to delay light while standard is a principle or example or measure used for comparison.

As an adjective standard is

falling within an accepted range of size, amount, power, quality, etc.

As nouns the difference between epalon and etalon

is that epalon is any of a group of neuroactive steroids related to progesterone while etalon is stallion (uncastrated male horse) or etalon can be standard (something used as a measure for comparative evaluations).

As nouns the difference between talon and etalon

is that talon is a sharp, hooked claw of a bird of prey or other predatory animal while etalon is an optical device containing parallel mirrors, used in laser design to delay light.

As nouns the difference between etalon and etaloning

is that etalon is an optical device containing parallel mirrors, used in laser design to delay light while etaloning is a fault that develops in thin charge-coupled devices when they behave as etalons.