| atri | a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract |
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| atri | either of two heart valves through which blood flows from the atria to the ventricles |
| atri | (nautical) of an anchor |
| atri | orach |
| atri | Asiatic plant resembling spinach often used as a potherb |
| atri | handsome low saltbush of arid southwestern United States and Mexico having blue-green prickly-edged leaves often used for Christmas decoration |
| atri | spiny shrub with silvery-scurfy foliage of alkaline plains of southwestern United States and Mexico |
| atri | Eurasian aromatic oak-leaved goosefoot with many yellow-green flowers |
| atri | the central area in a building |
| atri | any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) |
| atri | the upper chamber of each half of the heart |
| atri | the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus |