accessional,a.|ækˈsɛʃənəl|[f.prec.+ -al¹.]Pertaining to or due to accession; of the nature of an increase, additional, accessory.1646Sir T. BrownePseud.Ep.196This accessionall preponderancy is rather in appearance then reality.1784J. BarryLect.on Art (1848) v. 187Almost all compositions afford these accessional advantages.1805FosterEss.iv. viii. 253You will find various accessional suggestions.