|
OK, having looked at the OED, here's the deal:
The suffix -ade in this context means "The product of an action, and, by extension, that of any process or raw material; as in arcade, colonnade, masquerade, lemonade, marmalade, pomade. " In other words, lemonade is something made from lemons.
Lemonade is defined as "A drink made of lemon-juice and water, sweetened with sugar." And there is a note that says: "In England now very commonly applied to ‘aerated lemonade’, which consists of water impregnated with carbonic acid with the addition of lemon-juice and sugar."
|