from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to an adnoun
- n. a word or phrase qualifying a noun, such as an adjective and a relative clause
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to an adnoun; adjectival; attached to a noun.
from The Century Dictionary and Cyclopedia
- In grammar, belonging to or qualifying a noun; adjectival.
adnoun + -al (Wiktionary)
analogy of adverbial to verb and noun (Wiktionary)