Since I've never actually seen a squash OR a marrow in Britain, I'm not quite convinced they're the same thing. I figure we need some pictures to straighten things out once and for all.

I found this cool web site: The Cook's Thesaurus.

(Squash is divided into 2 groups: Summer Squash and Winter Squash.)

But despite all the pictures, I'm still confused about what a marrow is. On the Summer Squash page, that green object above the words "vegetable marrow" and left of the word "tinda"—what is it? A vegetable marrow or a tinda?

I ask my British friends: do you see a picture here that looks like a marrow?

The type I'm most familiar with is the acorn squash (near the top of the winter squash page). We cut them in halves or quarters, scoop out and discard the seeds and the stringy stuff they're attached to, sprinkle a little brown sugar on them, and bake them. When you eat them, you scoop the fleshy part out with a fork or spoon. You don't eat the green rind.

Technically squash are fruits since they contain seeds. But most people think of them as vegetables because they're not very sweet. (The brown sugar makes them more palatable.) I notice The Cook's Thesaurus calls them "fruit vegetables" along with cucumbers, tomatoes, etc.