Seed bismuth
From Tardis Wiki, the free Doctor Who reference
One of the Bookwyrm's frivolous suggestions as to where the Plume Coteries' Library might have come from was that it might have "grown from the seed bismuth". (PROSE: The Cactus and the Corpse [+]Loading...["The Cactus and the Corpse (short story)"])
Behind the scenes[[edit] | [edit source]]
The Seed Bismuth is a recurring element of the webcomic Gunnerkrigg Court, with a repeated, contextless claim that it "grew from the Seed Bismuth" being the only explanation the main characters ever get about the origins of the titular structure.