algorism /alˈgə-ri-zm/

1. The Arabic system of numeration
2. Arithmetic
3. An algorithm

• thoraces
• thoracic
• thoracic duct
• thoracic ducts
• thoraco-
• thoracocenteses
• thoracocentesis
• thoracoplasties
• thoracoplasty
• thoracoscope
• thoracoscopes
• thoracostomies
• thoracostomy
• thoracotomies
• thoracotomy
• Thorah
• thorax
• thoraxes
• thoria
• thorias
• thorite
• thorites
• thorium
• thoriums
• thorn