Spektrum

Etymology
In the sense “range” (18th c.) after, from. The sense “spectre” (16th c.) was directly from the Latin; it remained rare and became fully obsolete after the emergence of the contemporary meaning.

Noun

 * 1) spectrum range of colours, frequencies etc.
 * 2)  spectrum the full range of anything
 * 3)  spectre apparition, phantom
 * 1)  spectre apparition, phantom