1. A roman officer who controlled or superintended a particular command, charge, department, etc.; as, the prefect of the aqueducts; the prefect of a camp, of a fleet, of the city guard, of provisions; the pretorian prefect, who was commander of the troops guarding the emperor's person.
Origin: L. Praefectus, fr. Praefectus, p. P. Of praeficere to set over; prae = before _ facere = to make: cf. F. Prefet.
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... evolved to drive off the potentially-nasty bug before it has time to bite or lay eggs or do other unwanted stuff. So, all this may or may not make prefect sense and seem obvious, but my real question is: has anyone actually proved itching to protect us from arthropods or perhaps something else? ...
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