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

Derived forms: left atriums

Type of: atrium cordis, atrium of the heart

Encyclopedia: Left atrium

• countenance
• counter
• counter cheque
• counter conditioning
• counter tube
• counter-drill
• counter-sabotage
• counteract
• counteraction
• counteractive
• counteractively
• counterargument
• counterattack
• counterattraction
• counterbalance
• counterbalanced
• counterbattery fire
• counterblast
• counterblow
• counterbombardment
• counterbore
• counterchallenge
• counterchange
• countercharge
• countercheck