spectrum

As a noun spectrum

is specter, apparition.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As nouns the difference between echelons and spectrum

is that echelons is while spectrum is specter, apparition.

As nouns the difference between flange and spectrum

is that flange is an external or internal rib or rim, used either to add strength or to hold something in place while spectrum is specter, apparition.

As a verb flange

is to be bent into a flange.

As nouns the difference between chromatogram and spectrum

is that chromatogram is (analytical chemistry) the visual output from a chromatograph usually a graphical display or histogram while spectrum is specter, apparition.

As nouns the difference between spectrum and stripes

is that spectrum is specter, apparition while stripes is .

As a verb stripes is

(stripe).

As nouns the difference between spectrum and parameter

is that spectrum is specter, apparition while parameter is parameter.

As a noun spectrum

is specter, apparition.

As an adjective invisible is

unable to be seen; out of sight; not visible.

As nouns the difference between spectrum and gradient

is that spectrum is specter, apparition while gradient is gradient.

As a noun spectrum

is specter, apparition.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between schema and spectrum

is that schema is schema, diagram while spectrum is specter, apparition.