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- (biology) The complex formed by a pair of homologous chromosomes during meiosis I.
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
- Having a valence of 2. Webster 3rd
- Having two valences; e.g., cobalt has two forms, with valences of 2 and 3, respectively. Handbook of Chemistry and Physics, 2
Source: Dictionary of Mining, Mineral, and Related Terms