The noun YO-YO has 1 sense: 1  1. a toy consisting of a spool that is reeled up and down on a string by motions of the hand. 2  Meaning: 3  A toy consisting of a spool that is reeled up and down on a string by motions of the hand. 4  Classified under: 5  Nouns denoting man-made objects. 6  Hypernyms (yo-yo is a kind of...):
Malathion is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito eradication.In the US, it is the most commonly used organophosphate insecticide.alathion is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito eradication.
Malathion is pediculicidal (kills live lice) and partially ovicidal (kills some lice eggs). A second treatment is recommended if live lice still are present 7â9 days after treatment. Malathion is intended for use on persons 6 years of age and older. Malathion can be irritating to the skin.