A characteristic of something that makes it different from something else.
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.
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).
A statement that two expressions are not the same.