1. North American perennial herb; leaves are used medicinally; sometimes placed in genus Cassia
   - wild senna, Cassia marilandica

Type of: herb, herbaceous plant

Part of: genus Senna

• Thomsen's disease
• Thomson
• Thomson's gazelle
• thong
• Thor
• Thor Hyerdahl
• thoracentesis
• thoracic
• thoracic actinomycosis
• thoracic aorta
• thoracic cavity
• thoracic duct
• thoracic medicine
• thoracic nerve
• thoracic outlet syndrome
• thoracic vein
• thoracic vertebra
• thoracocentesis
• thoracoepigastric vein
• thoracotomy
• thorax
• Thorazine
• Thoreau
• Thoreauvian
• thoria