Euthanized vs Euthanised - What's the difference?

As verbs the difference between euthanized and euthanised

is that euthanized is past tense of euthanize while euthanised is past tense of euthanise.

(head)

(euthanize)

* (l) (British spelling) * (l) (abbreviation) * (l) (nonstandard or error)

(euthaniz)

To submit (a person or animal) to euthanasia.

* euthanatize * put down * put to sleep

(head)

(euthanise)

(euthanis)