any clever maneuver | a device for showing the operating condition of some system |
an instrumentality invented for a particular purpose | a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time |
an emblematic design (especially in heraldry) | a signal for attracting attention |
any ornamental pattern or design (as in embroidery) | (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction |
something in an artistic work designed to achieve a particular effect | |