Three possible answers:
Any of several carcinogenic or tetatogenic hetero cyclic hydrocarbons that occur as impurities in petroleum-derived herbicides.
Toxic substances.
You may also be asking about the dog breed, spelled dachshund. If you are, they are a breed of dogs that tend to be short in height and long in length. An popular, but improper name for them is "weiner dog".
dashunds are pernouced DOx-en some people put doxin
Dachshunds and doxins are the saame type of dog just different names for it.
Dioxins are persistent organic pollutants that can remain in the environment for many years, often decades, due to their chemical stability and resistance to degradation. In biological systems, they can accumulate in fatty tissues and have a half-life ranging from several years to over a decade, depending on the specific type of dioxin and the organism. This long persistence contributes to their potential for bioaccumulation and long-term health risks in humans and wildlife.