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paries Definition

pa·ries (per′ē ēz′, par′-)

noun pl. pa·ri′·etes′pə rī′ə tēz′

Biol. a wall, as of a hollow organ, cavity, or cell: usually used in pl.

Etymology: ModL < L, a wall < IE base *(s)per-, a bar, spear > spar, spear