The Collaborative International Dictionary
Inequation
Inequation \In`e*qua"tion\, n. (Math.) An inequality.
Wiktionary
inequation
n. (context mathematics English) A statement that two expressions are not the same.
Wikipedia
Inequation
In mathematics, an inequation is a statement that an inequality holds between two values. It is usually written in the form of a pair of expressions denoting the values in question, with a relational sign between them indicating the specific inequality relation. Some examples of inequations are:
a < b,
x + y + z ≤ 1,
n > 1,
x ≠ 0.
Some authors apply the term only to inequations in which the inequality relation is, specifically, not-equal-to (≠).