C7

C7 is a designation used in multiple fields to denote different concepts, items, or structures. Its meaning depends on the context, ranging from music and vehicles to anatomy, immunology, and mathematics.

In music, C7 denotes a C dominant seventh chord. This chord comprises the notes C, E, G, and B-flat and is built by taking a major triad (C–E–G) and adding a minor seventh interval (B-flat). It functions dominantly, often resolving to F major or F minor in a progression. The symbol C7 is common in jazz, blues, and popular music, and variations such as C9 or C13 extend the chord with additional tensions.

In automotive contexts, the Chevrolet Corvette C7 refers to the seventh generation of the Corvette, produced roughly from 2014 to 2019. It is recognized for its distinctive styling and performance-oriented design, including a high-performance V8 powertrain and advanced chassis technology. The C7 introduced contemporary materials, aerodynamics, and driving dynamics that continued the Corvette lineage.

In anatomy, C7 denotes the seventh cervical vertebra, located near the base of the neck. It is also known as the vertebra prominens due to its notably long spinous process, which is often felt at the base of the neck. C7 serves as a key landmark in clinical examination and imaging of the cervical spine.

In immunology, complement component C7 is a protein of the terminal complement system. It participates in forming the membrane attack complex that helps lyse pathogens. Deficiencies or dysfunctions of C7 can increase susceptibility to certain infections, particularly Neisseria species.

In mathematics, C7 often denotes the cyclic group of order 7, a basic object in group theory used to study symmetry and algebraic structures. It appears in various areas of algebra, geometry, and combinatorics.