'elongate-fruited' originates from Modern English as a compound of 'elongate' and 'fruit'. 'elongate' ultimately comes from Latin 'elongare', where 'e-/ex-' meant 'out' and the root related to 'longus' meant 'long'; 'fruit' originates from Latin 'fructus', where 'frui' meant 'to enjoy' or 'to have benefit'.

'elongate' passed from Latin 'elongare' into Medieval/Scientific Latin and then into English as 'elongate'; 'fruit' passed from Latin 'fructus' through Old French 'fruit' into Middle English 'fruit'. The compound form 'elongate-fruited' developed in botanical English by combining these elements to describe plant morphology.

Initially, 'elongate' meant 'made long or lengthened' and 'fruit' originally referred to 'enjoyment' or 'produce'; over time 'fruit' narrowed to the botanical sense 'the reproductive body of a plant', and the compound came to mean 'bearing long/elongated fruits'.