ACCESSORIAL

accessorial

(adjective) nonessential but helpful; “accessorial services included sorting and packing”

Source: WordNet® 3.1

Etymology

Adjective

accessorial

Of or pertaining to an accessory, e.g. to a crime.

Of or relating to an accession.

(logistics) Assessorial.

Noun

accessorial (plural accessorials)

(logistics) An assessorial charge.

Source: Wiktionary

Ac`ces*so"ri*al, a.

Definition: Of or pertaining to an accessory; as, accessorial agency, accessorial guilt.

Source: Webster’s Unabridged Dictionary 1913 Edition