The unsymmetrical hypothetical hydrocarbon radical,
CH3.CH2.CH, analogous to ethylidene, and regarded as the type of
certain derivatives of propane; -- called also propylidene.
That binds; obligatory. Binding beam (Arch.), the main timber in double flooring. -- Binding joist (Arch.), the secondary timber in double-framed flooring. Syn. -- Obligatory; restraining; restrictive; stringent...