A nutcracker is a device used to crack the shell of a nut. Nutcrackers can be used to refer to one or more of these devices.
nutcracker in British English
(ˈnʌtˌkrækə)
noun
1. (often plural)
a device for cracking the shells of nuts
2.
either of two birds, Nucifraga caryocatactes of the Old World or N. columbianus (Clark's nutcracker) of North America, having speckled plumage and feeding on nuts, seeds, etc: family Corvidae (crows)
nutcracker in American English
(ˈnʌtˌkrækər)
noun
1.
an instrument for cracking the shells of nuts, usually consisting of two hinged metal levers, between which the nut is squeezed
2.
either of two jaylike corvid birds that feed on nuts; specif., a white-spotted, dark-brown European bird (Nucifraga caryocatactes) or the grayish Clark's nutcracker (N. columbiana) of W North America