Nuthatch \Nut"hatch`\, n. [OE. nuthake. See 2d {Hack}.] (Zo["o]l.) Any one of several species of birds of the genus {Sitta}, as the European species ({Sitta Europ[ae]a}). The white-breasted nuthatch ({S. Carolinensis}), the red-breasted nuthatch ({S. Canadensis}), the pygmy nuthatch ({S. pygm[ae]a}), and others, are American.