They were its first occupants, and it would be some time before all this aseptic newness had been converted into a warm, human home, The children, doubtless, would catalyze the process rather effectively.
There are no more uses of "catalyst" in the book.
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All signs point to you being the catalyst.
Gayle Forman -- Where She Went
Meg McCaffrey, prophecies are the catalysts for every important event—every quest or battle, disaster or miracle, birth or death.