- any of various related insects having similar habits.
Origin of plant louse
First recorded in 1795–1805
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for plant louse
Perhaps the first battle will have to be fought with the aphis, or plant-louse.ABC of Gardening
Eben Eugene Rexford
Although the honeydew does not come from the little tubes on the back of the plant-louse, yet those tubes have their uses.
On the 4th of August, about one o'clock in the afternoon, I put into solitary confinement a plant-louse of the third generation.
The Red Ant (Formica rufa) is singularly adroit in seizing the droplet left it by the plant-louse.
On one of these leaves he placed a plant-louse, which was born under his own eyes, of a wingless mother.
- another name for an aphid
- jumping plant louse any small active cicada-like insect of the homopterous family Psyllidae (or Chermidae), having hind legs adapted for leaping, and feeding on plant juices