She admired: a natural phenomenon having been explained by him to her she expressed the immediate desire to possess without gradual acquisition a fraction of his science, the moiety, the quarter, a thousandth part.
There are no more uses of "moiety" in the book.
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The receptivity of a host cell to a virus is in many cases largely dependent on the structure of the glycan moieties present on the cell surface.
Had it not been for the moiety of barbarism in her nature it is probable that lady would not have been there, but her intense and fervid soul would not allow her to be absent on an occasion in which she was so terribly interested.