Just wonder how you consider anything with a seed is a fruit, when there is a lot of vegetable has a seed like squash and bitter gourd?

Fruit has a botanical defintion that is different from how the term is commonly used. To a botanist, fruit is any container of a flowering plant that contains fertilized seeds.

@LostInParadise is correct, squash and gourds are fruits, and we just lump together with other vegetables in the market.
In a sense that’s correct because in a broad term “vegetable” is some part of a plant – but in that same sense all the “fruit” we know of are also vegetables.

In the technical sense, a fruit is the product of flower fertilization that leads to a fruit body, with seeds, that is usually the primary way the plant propagates.

Squash is a fruit:

http://en.wikipedia.org/wiki/Cucurbita

It looks like English might not be your native language. Part of the problem might be our language itself. I don’t know, but perhaps other languages aren’t so confusing with their terms.

Welcome to Fluther!

Botanical definition
Fruit = a seed-bearing structure
(“Vegetable” is not a botanical term)

Culinary (cooking) definitions
Fruit = any edible part of a plant with a sweet flavor
Vegetable = any edible part of a plant with a savory flavor

Science Daily – Vegetable

Fruit = reproductive unit. Kind of ironic isn’t it.

Some things commonly considered vegetables, are actually fruit. Tomatoes are a very good example of this.

Basically, it’s a fruit if it has seeds.

When I use the term fruit, I mean the reproductive egg of some vegetation… or some people that remind me of myself from years past.

When I use the term vegetable, I mean edible vegetation that is not the fruit, nor does it remind me of myself from years past.

@Sinqer Some edible vegetation, such as nuts and mushrooms are neither :P

@bomyne Uh, nuts are vegetation…

And I agree, mushrooms are fungi, not fruit, and not vegetable ^.-