."a dollop in the middle range is about the size of a hen's egg...having a form that will hold for a while..."

I'm entirely with WW. In whipped cream or such it's about the amount easily held in a tablespoon, plopped on top of the main dish, and holding its shape is clearly an implied property of the substance in question.

As I recall, Tigger called it a "golollop" (sp?) when he took that amount of Roo's Strengthening Medicine. Although I don't think Extract of Malt has all that much solidity, now that I think of it...Maybe it was Pooh with Hunny.