helicon /helˈi-kon or -kən/

A circular bass tuba

• orchestra pits
• orchestras
• orchestra stalls
• orchestrate
• orchestrated
• orchestrates
• orchestrating
• orchestration
• orchestrations
• orchestrator
• orchestrators
• orchestric
• orchestrina
• orchestrinas
• orchestrion
• orchestrions
• orchid
• Orchidaceae
• orchidaceous
• Orchideae
• orchidectomies
• orchidectomy
• orchideous
• orchid-house
• orchid-houses