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n.1.(Bot.) A Linnæan order of plants having two styles.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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None of the previous studies examined XYY embryos, with equal numbers of XXX and XXY, again indicating that the mechanism was digyny. This indicates that chromosomes in 3PN zygotes were organized in a single bipolar spindle at syngamy, and suggests that only one centrosome is active (3).