auricle

US /ˈɔːr.ɪ.kəl/
UK /ˈɔːr.ɪ.kəl/
"auricle" picture
1.

the external part of the ear; the pinna

:
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The doctor examined the patient's auricle for any signs of infection.
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The intricate folds of the auricle help to funnel sound into the ear canal.
:
pinnaouter ear
2.

a chamber of the heart, typically one of the two upper chambers (atria) that receive blood from the veins and pump it into the ventricles

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Blood flows from the right auricle into the right ventricle.
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The heart has two auricles and two ventricles.
:
atrium