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  1. Oxford American Dictionary

    sac

    • IPA[sak]

    美式

    • n.
      a hollow, flexible structure resembling a bag or pouch；a cavity enclosed by a membrane within a living organism, containing air, liquid, or solid structures.

    • noun: sac, plural noun: sacs

    • 釋義

    名詞

    • 1. a hollow, flexible structure resembling a bag or pouch a fountain pen with an ink sac
    • ▪ a cavity enclosed by a membrane within a living organism, containing air, liquid, or solid structures.
    • ▪ the distended membrane surrounding a hernia, cyst, or tumor.