Spir

Spir or SPIR may refer to:


 * Spir, recently discovered class of actin nucleators in actin remodeling
 * Afrikan Aleksandrovich Spir (1837–1890), Russian philosopher
 * Juan Carlos Spir (1990) Colombian tennis player
 * Spir (album), an album by Karl Seglem's Sogn-A-Song
 * Spir (imprint), an imprint of VDM Publishing that publishes and sells Wikipedia articles in printed form via print on demand
 * Il spir, a viewing platform in the canton of Graubünden in Switzerland
 * Spectral presaturation with inversion recovery, a sequence of magnetic resonance imaging

Acronyms

 * Serviciul de Poliție pentru Intervenție Rapidă, a Romanian rapid response police unit
 * Special Purpose Islamic Regiment, a Chechen organization
 * Standard Portable Intermediate Representation, an intermediate language for parallel compute and graphics by Khronos Group