spectrum

IPA: spˈɛktrʌm

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.
(psychology, education, usually with the) The autism spectrum.
(chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
(mathematics, linear algebra) The set of eigenvalues of a matrix.
(mathematics, functional analysis) Of a bounded linear operator A, the set of scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.
(abstract algebra, algebraic geometry) The set, denoted Spec(R), of all prime ideals of a given ring R, commonly augmented with a Zariski topology and considered as a topological space.
(obsolete) Specter, apparition.
The image of something seen that persists after the eyes are closed.

Examples of "spectrum" in Sentences

It is defined in the bipolar spectrum.
Define the radius of the essential spectrum.
This is the origin of the absorption spectrum.
The clinical spectrum of the disease is broad.
The peak of spectrum of the sunlight is in UV.
The spectrum of competition frightened the firm.
Light bondage and spanking is part of the BDSM spectrum.
The fourth detects the ultraviolet portion of the light spectrum.
Closer to the visible range of the electromagnetic spectrum is the ultraviolet.
He discovered that ants were sensitive to the ultraviolet range of the spectrum.