persistent

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Related to persistent ductus arteriosus: patent ductus venosus

persistent

1. (of plant parts) remaining attached to the plant after the normal time of withering
2. Zoology
a. (of parts normally present only in young stages) present in the adult
b. continuing to grow or develop after the normal period of growth
3. (of a chemical, esp when used as an insecticide) slow to break down; not easily degradable

persistent

[pər′sis·tənt]
(botany)
Of a leaf, withering but remaining attached to the plant during the winter.

persistent

persistent

Permanent. See persistent data, persistent name and persistent object.
References in periodicals archive ?
The unilateral absence of a pulmonary artery is another rare congenital anomaly and is frequently associated with other cardiovascular anomalies, such as tetralogy of Fallot, septal defects, right aortic arch, and persistent ductus arteriosus.
Dr Helen Taussig, Paediatrician at the Johns Hopkins Hospital, Baltimore, made the important observation that babies with Fallot's tetralogy who, in addition had a persistent ductus arteriosus were in better condition and survived longer than infants without this extra defect.

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