Entry from British & World English dictionary
noun (plural valencies)Chemistry , chiefly British
- 1The combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with: carbon always has a valency of 4 Compare with valence1.
early 17th century: from late Latin valentia 'power, competence', from valere 'be well or strong'.
More definitions of valencyDefinition of valency in:
- The British & World English dictionary