1. The left upper chamber of the heart that receives blood from the pulmonary veins
   - left atrium, left atrium of the heart

Type of: atrium cordis, atrium of the heart

Encyclopedia: Atrium sinistrum

• round-backed
• round-bottom
• round-bottom flask
• round-bottomed
• round-eyed
• round-faced
• round-fruited
• round-headed leek
• round-leaved rein orchid
• round-shouldered
• round-spored gyromitra
• round-table conference
• round-tailed muskrat
• round-the-clock patrol
• round-trip light time
• round-trip ticket
• roundabout
• roundabout way
• rounded
• roundedness
• roundel
• roundelay
• rounder
• rounders
• roundhead