spectrum /spekˈtrəm/

1. The range of colour produced by a prism or diffraction grating
2. Any analogous range of radiations in order of wavelength
3. The range of frequencies of sound or a sound
4. The range of effectiveness of a drug, esp an antibiotic (pharmacology)
5. A range of opinions, activities, etc (figurative)
6. An after-image

specˈtral adjective

Relating to, or like, a spectrum

spectralˈity noun

specˈtrochemistry noun

Chemical spectroscopy

specˈtrogram noun

1. A photograph of a spectrum
2. A sound spectrogram (see under sound¹)

specˈtrograph noun

A spectroscope designed for use over a wide range of frequencies (well beyond visible spectrum) and recording the spectrum photographically (see also mass spectrograph under mass¹)

spectrographˈic or spectrographˈical adjective

spectrogˈraphy noun

spectrohēˈliogram noun

A photograph of the sun by monochromatic light

spectrohēˈliograph noun

An instrument for taking it

spectrohēˈlioscope noun

A similar instrument with which one can observe an image of the whole solar disc in the light of a single particular wavelength

spectrologˈical adjective

spectrologˈically adverb

spectrolˈogy noun

The science of the spectrum or spectrum analysis

spectromˈeter noun

1. An instrument for measuring refractive indices
2. One used for measurement of wavelength or energy distribution in a heterogeneous beam of radiation (see also mass spectrometer under mass¹)

spectrometˈric adjective

spectromˈetry noun

• ineducabilities
• ineducability
• ineducable
• ineffabilities
• ineffability
• ineffable
• ineffableness
• ineffablenesses
• ineffably
• ineffaceabilities
• ineffaceability
• ineffaceable
• ineffaceably
• in effect
• ineffective
• ineffectively
• ineffectiveness
• ineffectivenesses
• ineffectual
• ineffectualities
• ineffectuality
• ineffectually
• ineffectualness
• ineffectualnesses
• inefficacies