Polihydrydy

Polihydrydy is a term that does not have a clear, widely accepted definition in formal chemistry literature. It is not listed in standard encyclopedias or dictionaries, and when it appears in sources it is often either a misspelling of polyhydride or a speculative neologism used in non-peer-reviewed discussions to refer to concepts involving multiple hydride units or hydrogen-rich materials.

Etymology and possible meaning: The word seems to be built from the prefix poly-, meaning many, combined with hydride, a term used for hydrogen-containing ligands or ions in coordination chemistry. In some contexts polihydrydy is used to describe hypothetical or generalized ideas about systems with many hydride units, such as polyhydride clusters or highly hydrogen-saturated solids. However, there is no standardized or widely accepted definition.

Usage and context: Because the term is not standardized, its intended meaning can be ambiguous and varies between authors. In formal chemical writing, more precise terms such as polyhydride, hydride cluster, or hydrogen-rich material are typically preferred to avoid confusion. If polihydrydy appears in a text, it is advisable to check the source for the author’s intended sense and to compare with established terminology.

See also: Hydride, Polyhydride, Metal hydride, Hydrogen storage materials.