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  • word of the day

    air cell

    air cell - 365bet中国官方网站 definition and meaning for word air cell

    Definition
    (noun) a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
    Synonyms : air sac , alveolus

  • Word used in video below:
    text: a plant cell has a membrane and a cell wall.
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