I. |yünə|vālənt, yüˈnivələnt adjective
Etymology: International Scientific Vocabulary uni- + valent
: having a valence of one: as
a. : capable usually of combining with only one atom of another element
the hydrogen atom … is taken to be univalent — N.N.Greenwood
b. of a chromosome : lacking a synaptic mate : single
c. of an antibody : capable of agglutinating or precipitating but not both : having only one combining group
II. noun
: a univalent chromosome