nuncupative
Concise Oxford English Dictionary © 2008 Oxford University Press:
nuncupative /ˈnʌŋkjʊˌpətɪv/
▶adjective Law (of a will or testament) declared orally, especially by a mortally wounded soldier or sailor.
– origin C16: from late L. nuncupativus, from L. nuncupat-, nuncupare ‘declare’.
'nuncupative' also found in these Oxford entries:

