An antiquark is the antiparticle of a quark.

A quark is a type of elementary particle.

I use quark cheese as a topping for my salad.

An antiparticle is a particle that pairs with a matter particle.

If you plant this seed, beautiful flowers will bloom.

He is an expert in physics.

In physics, a meson is a type of particle made up of a quark and an antiquark.

My younger brother is the middle child in our family.

He is a professor of physics.

He is an expert in geophysics.