Is there a word to describe a gathering lump of water hanging on a surface that has not yet produced a droplet? Imagine a small pool of water without the surface upon which it's resting.
I agree with camelbrush's answer, but I also thought of the less technical word of bead.
As a noun, bead means:
As a verb, bead means:
I think of a bead as a droplet forming, but before it drops as a droplet.
Also, there is an adjective: Pendent, which is used for anything hanging down.