Nouns starting with S

• spectre — Noun – English ～ a ghostly appearing figure; "we were unprepared for the apparition that confronted us"
• spectrogram — Noun – English ～ a photographic record of a spectrum
• spectrograph — Noun – English ～ a spectroscope by which spectra can be photographed
• spectrograph — Noun – English ～ a photographic record of a spectrum
• sound spectrograph — Noun – English ～ a spectrograph for acoustic spectra
• spectrographic analysis — Noun – English ～ the use of spectroscopes to analyze spectra
• spectrometer — Noun – English ～ spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer
• spectrometry — Noun – English ～ the use of spectroscopes to analyze spectra
• spectrophotometer — Noun – English ～ a photometer for comparing two light radiations wavelength by wavelength
• spectroscope — Noun – English ～ an optical instrument for spectrographic analysis
• spectroscopic analysis — Noun – English ～ the use of spectroscopes to analyze spectra
• spectroscopy — Noun – English ～ the use of spectroscopes to analyze spectra
• spectrum analysis — Noun – English ～ the use of spectroscopes to analyze spectra
• spectrum — Noun – English ～ a broad range of related objects or values or qualities or ideas or activities
• spectrum — Noun – English ～ an ordered array of the components of an emission or wave
• spectrum line — Noun – English ～ an isolated component of a spectrum formed by radiation at a uniform frequency
• sound spectrum — Noun – English ～ the distribution of energy as a function of frequency for a particular sound source
• speculation — Noun – English ～ a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence); "speculations about the outcome of the election"; "he dismissed it as mere conjecture"
• speculation — Noun – English ～ an investment that is very risky but could yield great profits; "he knew the stock was a speculation when he bought it"
• speculation — Noun – English ～ continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature; "the habit of meditation is the basis for all real knowledge"

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