jezgra

1. Croat. (in physics, biology) nucleus
   Atomska jezgra sastoji se od protona i neutrona. — The atomic nucleus consists of protons and neutrons.
   Ćelijska jezgra sadrži DNK. — The cell nucleus contains DNA.
2. Croat. core
   Zemljina jezgra je izuzetno vrela. — The Earth's core is extremely hot.
   Svaka jezgra procesora radi nezavisno. — Each core of the processor works independently.
3. Croat. essence; heart
   To je prava jezgra celog problema. — That is the real heart of the whole problem.
4. Croat. (of a nut, seed) kernel
   Orahova jezgra se dodaje u testo. — The walnut kernel is added to the dough.

In Serbia: jezgro — the standard form is the neuter (jezgro atoma, Zemljino jezgro, jezgro problema); the feminine jezgra is typical mostly of Croatian usage. Serbian versions of the examples: Atomsko jezgro se sastoji od protona i neutrona; Ćelijsko jezgro sadrži DNK; Zemljino jezgro je izuzetno vrelo; Svako jezgro procesora radi nezavisno; To je pravo jezgro celog problema; Jezgro oraha se dodaje u testo. In Serbian, jezgra is usually the genitive singular or nominative plural of jezgro (osam jezgara — genitive plural).