diclause

Diclause is a term used in some linguistic, logical, and computational contexts to refer to a unit that contains two related clauses. It is not a standard term in mainstream grammar or formal logic, and its precise meaning varies by domain.

In linguistics, diclause is sometimes used informally to describe a sentence composed of two independent clauses that are coordinated or juxtaposed, such as “The rain fell, and the streets turned slick.” In this sense, a diclause resembles what is commonly called a compound sentence; the two clauses may share a subject or be independent.

In logic and rule-based systems, diclause may denote a pair of clauses used together to express a two-part constraint or rule. One might represent a diclause as a pair (C1, C2) that must both hold, or as a single construct where two sub-clauses contribute to a larger condition. The exact syntax depends on the formal system, and the term is not universal.

Examples:

- A natural-language diclause: “The project finished on time, and the budget remained under control.”

- A rule-based diclause: (If A then B) and (If C then D) combined as a two-part condition.

See also: Clause, Compound sentence, Coordinating conjunction, Logical clause, Rule engine.