Plural of 'alive' when used as a noun; living beings or those in a state of being alive (archaic or very rare usage).
From 'alive' used as a noun with plural '-s' ending. This is an extremely rare formation in modern English, preserved mainly in historical or specialized texts.
This word is so obscure that even most English professors haven't encountered it—it represents a grammatical possibility that English speakers almost never actually use.
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