Pertaining to, or in the manner of, an aunt; feminine version of avuncular
1990US, Peter Van Inwagen, Material Beings, Cornell University Press, ISBN 0801483069, p. 9,It may be that stipulations about parts and wholes are, in some way that undermines my materteral analogies, unlike stipulations about aunts and legacies.
2004UK, Saif Rahman, Archipelago, Twenty First Century Publishers Ltd, ISBN 1904433227, p. 150,Only some insistent pleading (materteral rather than avuncular) had changed their mind.
2006US, R. D. Chrisman, Cathedral Ledge, AuthorHouse, ISBN 1425907865, p. 123It pleased her to see Aunt Maude waiting tables. Smiling to herself, Alice reflected that Maude was materteral ... like a kindly aunt.