1. A common poplar of eastern and central United States; cultivated in United States for its rapid growth and luxuriant foliage and in Europe for timber
   - necklace poplar, Populus deltoides

Type of: cottonwood

• observantly
• observation
• observation dome
• observation post
• observation station
• observation tower
• observational
• observator
• observatory
• observe
• observed
• observed fire
• observer
• observer's meridian
• observing
• observingly
• obsess
• obsessed
• obsession
• obsessional
• obsessionally
• obsessive
• obsessive-compulsive
• obsessive-compulsive disorder
• obsessive-compulsive personality