365bet中国官方网站

  • word of the day

    semilunar valve

    semilunar valve - 365bet中国官方网站 definition and meaning for word semilunar valve

    Definition
    (noun) a heart valve with cusps shaped like half-moons; prevents blood from flowing back into the heart

  • Word used in video below:
    text: maybe we don't need this saturn valve
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