Early 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From classical Latin acervālis characterized by piling up from acervus heap + -ālis.
Definition of acerval in US English:
acerval
adjectiveəˈsəːvl
rare
Relating to a heap; resembling a pile.
Origin
Early 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From classical Latin acervālis characterized by piling up from acervus heap + -ālis.