uranyl acetate (medicine) and bye-byes (oh)

uranyl acetate (medicine)

uranyl acetate
<chemical> Uranium salt that is very electron dense and that is used as a stain in electron microscopy, usually for staining nucleic acid containing structures in sections.

bye-byes (oh)

n
go (to) bye-byes
BrE an expression meaning go to sleep, used by or to children

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