I picture two people baking together or eating fish, a situation when you might actually offer someone straight up lemon juice.
Lemonade is "Limonada". =) We would say "suco de limão" as much as English speakers would say "lemon juice". Meaning, not often, but possibly. =)
I don't know about BP, but in EP you would never say "sumo de limão" (suco is sumo in EP) when you mean "lemonade". You would say "limonada". Anyway, "limonada" also exists in BP, so you should use it.
Brazilian Portuguese: Here is a picture showing you the difference: http://chanticleersociety.org/cfs-filesystemfile.ashx/__key/CommunityServer.Discussions.Components.Files/17/7802.Limao-lima-e-Siciliano-copy.jpg
Here is how a user in that forum explained it:
A Lime is called Limão;
A Lemon is called Limão Siciliano;
A Key Lime is called Lima da Pérsia or just Lima (I guess you call this key lime).
The picture really shows it better. For fun: caipirinhas are made with limão (lime), and your cola soft drinks come with a slice of limão. And limonadas (lemonades) are made with limão as well. Hope it helps!
The picture they used for the Lima de pérsia or lima looks like an orange to me (key limes just look like tiny limes). But looking up the scientific name yields a key lime, so I think they just used the wrong picture. They're called key limes because they grow well in the Florida Keys. Thanks for the reference
In central and south American Spanish speaking countries, limes are called 'green lemon' or 'limón verde' (This is confusing since they are not the same fruit and lemons are green before they are ripe!). The same is probably true in Portuguese, so a lime would be 'limào verde'. I also guess that when it's clear which one you mean, this may be shortened to just 'limão' .
I've also heard that in many areas of South America you won't find lemons, but limes are common and that here they are simply and incorrectly called 'límon/limão/lemon'.
Could you not post ignorant suppositions? It makes it really difficult to use the forum to learn a language when people do that.
It's not supposition, but from personal experience and backed up by my Portuguese dictionary (Collins).
This blog post from someone living in Brazil confirms my experience - http://eatrio.net/2012/05/lemon-lime-confusion-in-brazil.html
While I accept that in some parts of Brazil they also use the term Lima, this isn't universally the case and from googling it actually seems that Lima is just another word for Lemon and not lime.
Thanks for that, good to know. In Spain lime is also 'lima', the confusing usage of 'limón verde' only happens in parts of South/Central America (if I believe what I was told).