reactant

The same mixing happened when three different blobs, each carrying a single reactant, fused together.

Captain Strong took his place in the pilot's chair next to Tom and strapping himself in snapped out, "Feed reactant!"

"Empty the reactant fuel tanks of all but enough for us to raise ship and touch down over to the fairgrounds," said Strong.

On the power deck, the big cadet turned to his control panel, took a deep breath, and opened the reactant feeders wide.

If you so much as smell that grub, I'll come down and feed you into the reactant chamber!

I don't know who's going to be first, but I can't even strip my ship by tomorrow morning, let alone soup up the reactant.