ydinteiden
Ydinteiden is the genitive plural form of the Finnish noun ydin, meaning nucleus. It is used primarily in scientific Finnish to refer to multiple atomic nuclei and to express possession or association in phrases discussing properties or processes that involve more than one nucleus. In physics and chemistry texts, ydinteiden is encountered in contexts such as energy levels, binding energies, nuclear reactions, and isotopic analyses, where statements about “the nuclei” or “of the nuclei” are needed. For example, phrases like ydinteiden energiatason (the energy levels of the nuclei) or ydinteiden koostumus (the composition of the nuclei) illustrate its typical usage.
The term is distinct from biological terminology for cell nuclei, since Finnish usually uses tuma to denote
In summary, ydinteiden is a specialized plural genitive form used when discussing more than one atomic nucleus