'veinless' originates from the word 'vein' combined with the suffix '-less', where 'vein' refers to the tubular structures in the body or leaf, and '-less' means 'without'.

'vein' changed from the Old French word 'veine' and eventually became the modern English word 'vein'.

Initially, it meant 'without veins', and this meaning has largely remained the same in modern usage.