conus arteriosus

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co·nus ar·te·ri·o·sus

 (kō′nəs är-tîr′ē-ō′səs)
n. pl. co·ni ar·te·ri·o·si (kō′nī är-tîr′ē-ō′sī, kō′nē är-tîr′ē-ō′sē)
1. A conical extension of the right ventricle in the heart of mammals, from which the pulmonary artery originates.
2. An extension of the ventricle in the heart of amphibians and certain fish.

[New Latin cōnus artēriōsus : Latin cōnus, cone + Medieval Latin artēriōsus, arterial.]
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