'experimentally-constructed' originates from the combination of 'experimentally' and 'constructed'. 'Experimentally' comes from 'experiment', which originates from Latin 'experimentum', meaning 'a trial, test'. 'Constructed' comes from Latin 'constructus', meaning 'to build'.

'experimentum' transformed into the Old French 'experiment', and eventually became the modern English word 'experiment'. 'Constructus' transformed into the Old French 'construire', and eventually became the modern English word 'construct'.

Initially, 'experimentum' meant 'a trial or test', and 'constructus' meant 'to build'. These meanings have largely remained the same in modern usage.