the branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)
a coupling that connects or disconnects driving and driven parts of a driving mechanism; "this year's model has an improved clutch"
a pedal or lever that engages or disengages a rotating shaft and a driving mechanism; "he smoothely released the clutch with one foot and stepped on the gas with the other"
a number of birds hatched at the same time
a tense critical situation; "he is a good man in the clutch"
a remote or indirect consequence of some action; "his declaration had unforeseen repercussions"; "reverberations of the market crash were felt years later"