What does diazinon mean?
Diazinon is a synthetic organophosphate insecticide developed in the mid-twentieth century to control a broad range of insects, including flies, aphids, and cockroaches, on crops, livestock, lawns, and in households. Chemically, it works by inhibiting acetylcholinesterase, an enzyme essential to nerve function in insects — a mechanism it shares with humans, which is why it is also poisonous to people, birds, fish, and other wildlife at sufficient doses. Its name reflects its structure: the prefix 'di-' plus 'az(o)-', referencing the two nitrogen atoms in its pyrimidine ring, and '-one', denoting its ketone group. Once among the most heavily used home-and-garden pesticides in the United States, diazinon came under strict regulation as evidence mounted of its hazards to waterways and wildlife; residential sales were phased out there by the mid-2000s, though limited agricultural uses continue in some countries under tight controls.
nounA synthetic organophosphate compound used widely as an agricultural and household insecticide against flies, cockroaches, and other pests; its residential use has been phased out in many countries due to toxicity concerns.
- A synthetic organophosphate insecticide used to control flying and crawling insects on crops, livestock, and formerly in homes and gardens.
"The apple orchard was sprayed with diazinon to control the codling moth infestation."
"Regulators restricted diazinon after studies linked runoff from golf courses and farms to bird kills."
"Farmers once relied on diazinon to protect vegetable crops, but safer alternatives have largely replaced it."
Very rare; occasionally used in scientific writing to refer to multiple formulations or measured residues of the compound.
"The lab report listed several diazinons recovered from the soil samples."
Its name literally encodes its chemistry: 'di' for two nitrogens, from the same 'azote' root that gave nitrogen its French name.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diazinon
The name 'diazinon' was coined in the 1950s as a systematic chemical name reflecting the compound's structure: 'di-' (two) combined with 'az(o)-', derived ultimately from the Greek-rooted French word 'azote' meaning nitrogen, referring to the two nitrogen atoms in its heterocyclic pyrimidine ring, plus '-one' indicating a ketone functional group. It belongs to a family of organophosphate pesticide names built on similar chemical-naming principles. The element name 'azote' itself traces back through French chemist Guyton de Morveau to Greek roots meaning 'lifeless'.
How diazinon is actually used
Diazinon is a technical term encountered mainly in agricultural, regulatory, environmental-science, and toxicology contexts rather than everyday speech. It carries strongly negative connotations of chemical toxicity and environmental contamination.
Easily confused with diazinon
Diazepam is a benzodiazepine sedative drug (Valium), whereas diazinon is an organophosphate insecticide; the two share a similar spelling but have entirely unrelated uses.