univalent

• 主要用于化学和数学的形容词，化学中表示化合价为1的（一价的），数学中表示单值的。日常使用中已基本过时。

An adjective primarily used in chemistry and mathematics, meaning having a valence of one (chemistry) or having one value (mathematics). It is largely obsolete in general use.

1. Unpaired chromosomeC2formalscientific

   Describes a chromosome that is not paired or united with its homologous chromosome during synapsis.

   单价染色体

   • During meiosis, a univalent chromosome fails to pair with its homolog.
   • The presence of a univalent can lead to aneuploidy in the resulting gametes.
   • Researchers observed a univalent in the cell division of the hybrid plant.

   同义词singleunpaired

2. C2formalscientific

   Having a chemical valence of one; capable of combining with one atom of hydrogen or its equivalent.

   一价的

   • Hydrogen is a univalent element.
   • Sodium and potassium are univalent metals.
   • The univalent ion carries a single positive charge.

   同义词monovalent

   反义词bivalentdivalentmultivalentpentavalentpolyvalenttetravalenttrivalent