noun

• (medicine) Initialism of white blood cell. [(hematology, cytology, immunology) A type of blood cell that is involved with an immune response, or part of the immune system.]
• (boxing) Initialism of World Boxing Council, one of several sanctioning bodies in professional boxing.
• (baseball) Initialism of World Baseball Classic, a tournament for national teams jointly organized by the International Baseball Federation and Major League Baseball.
• Initialism of Westboro Baptist Church, an unaffiliated Baptist church known for its hate speech.