If a lemon is yellow what is a green lemon called?

lime         .

..........................................an unripe lemon.

not ripe yet......

Kid, go back to playing with your action figures. You are boring us here.

A green lemon is still a lemon, its just not ripe or something.

There's a fruit very similar to lemon which is green when its ripe, and its called a "lime"

But a lemon is still a lemon even if its a different color for some reason.

lime.       ....

In English , a Lime.

In French, a lemon is citron, ( not to be confused with Citroen, another kind of lemon), a lime is citron vert, literally a green lemon.

Ripe oranges are orange, ripe grapefruits are yellow, ripe lemons are yellow, but un-ripened lemons are green, and limes are also green!

A lime. U dum ok