Answer: quarks

AnswerCrossword Clue
QUARKSCharmed particles
QUARKSSubatomic particles
QUARKSHypothetical particles
QUARKSUp and down
QUARKSPhysics particles named after a James Joyce coinage
QUARKSTeeny particles in physics
quarksQUARK, an imagined atomic particle
quarkssubatomic particle thought to form the basis of all matter