Definition of "univalent" [u•niv•a•lent]

• Chemistry Having valence 1. (adjective)
• Chemistry Having only one valence. (adjective)
• Genetics Of or relating to a chromosome that is not paired or united with its homologous chromosome during synapsis. (adjective)
• Genetics A univalent chromosome. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This seems to imply that there couldn't be a coherent, univalent group intention that stands separate from the individuals who constitute the group."
• "They are fairly light and relatively soft, at 2 to 4 on Mohs 'hardness scale for the univalent micas."
• "Attention: univalent pertussis vaccine: will remain stable for only 3 to 7 days at 37°C."