term:

Nuncupative

nuncupative adj

[Medieval Latin nuncupativus, from Late Latin, so-called, from Latin nuncupatus, past participle of nuncupare to name, probably ultimately from nomen name + capere to take]
: stated by spoken word

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.