A conditional clause is a °clause that expresses a °conditional circumstance of the °event described by the °matrix clause.
A complex clause containing a conditional subordinate clause may be called "conditional complex", though the simple term "conditional" is often used in this way (e.g. Traugott et al. (eds) 1986). ❡
A conditional clause is also called "protasis", and the matrix clause (or clause fragment) is called "apodosis".
conditional relation (SEM) / construction (CXN) = a semantic relation between two events that involves a logical material implication relation between their corresponding propositions, some type of causal relation between the corresponding events, and non-positive epistemic stance; and the construction that expresses that relation. Example: If you press this button, the door will open is an instance of the conditional relation and construction. The causally antecedent proposition is the protasis, and the causally consequent proposition is the apodosis. A conditional may express a content, epistemic or speech act causal relation. (Section 17.3.1)