die Weintraube
grape
The individual round or oval berry fruit that grows on a grapevine and is used for making wine or for eating directly.
Diese kernlose Weintraube ist besonders süß und saftig.
This seedless grape is especially sweet and juicy.

grape
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grape
The individual round or oval berry fruit that grows on a grapevine and is used for making wine or for eating directly.
Diese kernlose Weintraube ist besonders süß und saftig.
This seedless grape is especially sweet and juicy.

The word is made up of 'der Wein' (wine) and 'die Traube' (grape/bunch of grapes). So it names the fruit from which wine is traditionally made.
Im Herbst beginnt die Lese der Weintrauben für den neuen Wein.
In autumn, the harvesting of grapes for the new wine begins.
'Die Weintraube' refers to the single berry. A whole cluster with many berries is often simply called 'eine Traube' (a bunch of grapes) or 'Trauben' (grapes) in everyday language.
Kannst du mir bitte eine Traube aus dem Kühlschrank holen?
Could you please get me some grapes from the fridge?
Common adjectives used with 'Weintrauben' (grapes) describe their qualities. These include 'kernlos' (seedless), 'süß' (sweet), 'saftig' (juicy), as well as their color: 'rot' (red) or 'grün' (green).
Kinder mögen besonders gern kernlose, grüne Weintrauben.
Children especially like seedless green grapes.
grape / cluster
'die Traube' and 'die Weintraube' can mean the same thing when talking about fruit: the fruit that grows on a grapevine and that can be eaten or made into wine. 'Traube' is very common in everyday language and often shorter. 'Weintraube' is more precise when you want to make clear that you mean the fruit. This can be important because 'Traube' can also mean a dense group of people. When talking about fruit, both words are usually understood.

Wegen der Hitze stellte sie die Weintrauben sofort in den Kühlschrank.
Because of the heat, she put the grapes in the fridge right away.
Erik kauft heute Trauben, weil seine Freunde zum Frühstück kommen.
Erik is buying grapes today because his friends are coming for breakfast.