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portio

por·tio

noun \ˈpȯr-shē-ˌō, ˈpȯrt-ē-ˌō\

plural por·ti·o·nes \ˌpȯr-shē-ˈō-ˌnēz\

: a part, segment, or branch (as of an organ or nerve) <the visible portio of the cervix>

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