
[Middle English, properly ordered, from Latin ōrdinātus, past participle of ōrdināre, to set in order, from ōrdō, ōrdin-, order.]
1. Of a figure, having all its sides and angles equal (e.g. equilateral triangle).
2. Any one of a series of parallel chords of a conic section, in relation to the diameter that bisects each. It may be used to form an ellipse, so can be applied to the design of vaults.
| ordered mechanism, order of reflection, order of reaction | |
| orexin, organ, organ culture |
The vertical line in a graph along which is plotted one of the factors considered in the study, as temperature in a time–temperature study. The other line is called the abscissa.
