The coma and the nucleus together form the comet's head.

The cytoplasm consists of proteins, the nucleus of nucleic acids.

Protons can be found at the nucleus of an atom.

Red blood cells have no nucleus.

Helium is the second simplest atom. It consists of a nucleus containing two protons and two neutrons. Around the nucleus orbits two electrons.

The nanomachines can drill into cancer cells, causing the cells’ nucleus to disintegrate into fragments.

You two are the nucleus of the team.

A hazy cloud called a coma surrounds the comet's nucleus.

The nucleus and optional coda of a syllable are called the rime.

The atom's nucleus is surrounded by an electron cloud.