A basic property of an experimental unit whose value cannot be changed by the experimenter. For example, the experimenter can vary the amount of fertilizer in an experiment, but cannot change the composition of the soil in a field. See alsoacceptance sampling.
Computer
A defined property of an entity, object, etc. In computer graphics it is a particular property that applies to a graphical output primitive; lines have attributes such as line width, colour, and line style. See alsoERA model, inheritance.
Internet
Used in the Hypertext Markup Language to provide data relevant to a tag. For example, the FONT tag can be augmented by a SIZE attribute which changes the size of text expressed in that font.