nonpersistent

adjective

1. persisting, especially in spite of opposition, obstacles, discouragement, etc.; persevering: a most annoyingly persistent young man.
2. lasting or enduring tenaciously: the persistent aroma of verbena; a persistent cough.
3. constantly repeated; continued: persistent noise.
4. Biology.
   1. continuing or permanent.
   2. having continuity of phylogenetic characteristics.
5. Botany. remaining attached beyond the usual time, as flowers, flower parts, or leaves.

adjective

1. (of pesticides) breaking down rapidly after application; not persisting in the environment

adjective

1. showing persistence
2. incessantly repeated; unrelentingyour persistent questioning
3. (of plant parts) remaining attached to the plant after the normal time of witheringa fruit surrounded by a persistent perianth
4. zoology
   1. (of parts normally present only in young stages) present in the adultpersistent gills in axolotls
   2. continuing to grow or develop after the normal period of growthpersistent teeth
5. (of a chemical, esp when used as an insecticide) slow to break down; not easily degradable

adj.1723, from persistence or from Latin persistentem (nominative persistens), present participle of persistere (see persist). Related: Persistently. adj.

1. Having a short life or existence under natural conditions.