What type of bacteria are indicated by the term 'cocci'?

The term 'cocci' refers specifically to bacteria that are spherical or round in shape. This classification is derived from the Greek word 'kokkos', meaning berry, which reflects their rounded appearance. In microbiology, bacteria are primarily categorized based on their shapes, which include cocci (spherical), bacilli (rod-shaped), and spirilla (spiral-shaped).

Cocci can exist as single cells or form arrangements such as chains (streptococci) or clusters (staphylococci). This shape is crucial for identification and classification of bacteria, influencing their behavior, reproduction, and the types of diseases they may cause. Understanding these structural attributes is important for effective diagnosis and treatment in clinical settings.