| speckle |
a speck or small mark, esp. on skin, feathers, leaves, or the like. [3 definitions] |
| speckled trout |
the brook trout, or the sea trout. |
| specs |
(informal) specifications. [2 definitions] |
| spectacle |
a visible, usu. impressive thing or action, esp. a public performance or display. [3 definitions] |
| spectacular |
of, pertaining to, or like a spectacle; impressive; marvelous. [3 definitions] |
| spectator |
one that watches or observes. [2 definitions] |
| specter |
a ghost or apparition, esp. one that causes dread or terror. [2 definitions] |
| spectra |
a plural form of spectrum. |
| spectral |
of, pertaining to, or like a specter. [2 definitions] |
| spectro- |
spectrum. |
| spectrogram |
a graphic representation or photograph of a spectrum. |
| spectrograph |
a spectroscope equipped to make a photograph or graphic representation of a spectrum. |
| spectroheliograph |
a device that is used to make photographs of the sun, using a single light from the spectrum, such as violet. |
| spectrometer |
a spectroscope equipped to measure wavelengths and the positions and angles of lines in a spectrum. |
| spectrophotometer |
an instrument that measures how much light is absorbed, transmitted, or produced by an object or chemical as a function of wavelength. |
| spectroscope |
an optical instrument that enables examination, measurement, or recording of a spectrum by rendering its component electromagnetic waves, as of light or radiation, distinct and visible. |
| spectrum |
an array of a physical system or phenomenon according to the magnitude of one of its properties such as mass or wavelength, esp. an array of light in the order of wavelengths that produces the rainbow. [2 definitions] |
| specular |
of or relating to the mirror-like reflection of waves from a surface. |
| speculate |
to wonder or make a guess or guesses with respect to something. [5 definitions] |
| speculation |
the act or process of thinking, wondering, or guessing about something. [4 definitions] |
| speculative |
of, pertaining to, or based on conjecture or theorizing. [4 definitions] |