The result of a subtraction; sometimes the absolute value of this result.
A disagreement or argument.
An addition to a coat of arms to distinguish two people's bearings which would otherwise be the same. See augmentation and cadency.
A characteristic of something that makes it different from something else.
The quality of being different.
The quality or attribute which is added to those of the genus to constitute a species; a differentia.
The set of elements that are in one set but not another ( scriptstyle A◌̅B).
Significant change in or effect on a situation or state.
A Boolean operation which is true when the two input variables are different but is otherwise false; the XOR operation ( scriptstyle A◌̅B+◌̅AB).
An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; from which one is to determine a particular quantity.
The act or process of equating two or more things, or the state of those things being equal (that is, identical).
A small correction to observed values to remove the effects of systematic errors in an observation.