What does the rep in yrep stand for?

I hope I am not asking a stupid question by asking what does the rep in y^{rep} stand for when we draw from the posterior predictive distribution? Does it stand for a word like repeated or replicated?

I’ve tried to find this but so far I’ve been unsuccessful.

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Replicate, see p.161 of http://www.stat.columbia.edu/~gelman/bayescomputation/bdachapter6.pdf