persistent
1. (of plant parts) remaining attached to the plant after the normal time of withering
2. Zoologya. (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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
persistent
[pər′sis·tənt] (botany)
Of a leaf, withering but remaining attached to the plant during the winter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
persistent
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