Definify.com

Webster 1913 Edition

Adj.

Pertaining to the order of plants including the soursop, custard apple, etc.

anonaceous ‎(comparative more anonaceous, superlative most anonaceous)

Of or pertaining to the soursop and other members of the Annonaceae family.
The soursop fruit comes from an anonaceous plant.

pertaining to the Annonaceae family