'single-page' is a modern compound formed from 'single' and 'page'. 'single' originates from Latin 'singulus', where 'singulus' meant 'one each'; 'page' originates from Latin 'pagina', where 'pagina' meant 'a page or leaf of writing.'

'singulus' entered English via Old French and Middle English as 'single', and 'pagina' came into English through Old French 'page' and Middle English; the compound 'single-page' developed in modern English as a straightforward combination of the two words.

Initially, 'singulus' meant 'one each' and 'pagina' meant 'a leaf/page'; over time these retained their basic senses and the compound came to mean 'consisting of one page' or 'relating to a single web page' in modern usage.