a device for showing the operating condition of some system | indicator that establishes the horizontal when a bubble is centered in a tube of liquid |
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 | a structure consisting of a room or set of rooms at a single position along a vertical scale |
a signal for attracting attention | a flat surface at right angles to a plumb line |
(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 | a position on a scale of intensity or amount or quality |
| height above ground |
| an abstract place usually conceived as having depth |
| a specific identifiable position in a continuum or series or especially in a process |
| a relative position or degree of value in a graded group |