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Adjective: univalent  ,yoo-ni'vey-lunt
  1. (genetics) used of a chromosome that is not paired or united with its homologous chromosome during synapsis
    "a univalent chromosome"
  2. (chemistry) having a valence of 1
    - monovalent

See also: valence, valency

Antonym: double, multivalent, polyvalent

Encyclopedia: Univalent