1) Acaudal 2) Acaudate 3) Having no tail 4) Not having a tail 5) Tailless 1) Acaudal 2) Acaudate 3) Tailless 
tailless
• (a.) Destitute of a tail, as the frogs and toads.
Taillessness. 
A·nu'rous adjective (Zoology) Destitute of a tail, as the frogs and toads. [ Also written anourous .]
In zoology, anurous refers to an animal destitute of a tail, like for example the frogs and toads.
[adj] - not having a tail
tailless adjective not having a tail; `anurous toads and frogs`
having no tail.