I squeezed juice from a lemon to make dressing.
This fruit juice is 100% orange.
This mandarin is full of sweet juice.
Jelly containing fruit juice is popular.
果汁 is the general, more formal term for fruit juice, while パインジュース specifically means pineapple juice as an everyday drink.
果汁 is the liquid squeezed from fruit, whereas 果肉 is the solid flesh/pulp of the fruit itself.
containing no fruit juice; fruit-juice-free
natural fruit juice
concentrated fruit juice
grape juice
Compound of 果 (fruit) and 汁 (juice, liquid).