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.
Most serious insecticide poisonings result from the organophosphate and carbamate types of insecticides, particularly when used in suicide attempts. Examples of organophosphates include malathion, parathion, fenthion, dursban, diazinon, chlorpyrifos, and sarin. Some of these compounds are derived from nerve gases.