(chemistry) The strong base Ra(OH)₂ obtained when radium reacts with water; it has no commercial use

(inorganic chemistry) The acid sodium salt of arsenic acid, Na₂HAsO₄

(genetics) The first filial generation of seeds or animal offspring, which are usually vigorous and uniform. Produced by crossing two distinctly different parents.

The practice of keeping the mouth clean in order to prevent cavities (dental caries), gingivitis, periodontitis, bad breath (halitosis), and other dental disorders.

A vehicle that uses two or more power sources, most commonly an internal combustion engine, a battery, an electric generator, and an electric motor, so as to reduce local emissions with adequate vehicle performance.

plural of hybrid vehicle

plural of hydrogen car

plural of hydrogen vehicle

UK, Australia, and Canada spelling of hybrid vigor

A property of some hybrids that are more likely to outperform either purebred parent in surviving.