I. acephali
plural of acephalus
II. aceph·a·li (ˈ)āˈsefəˌlī, əˈ-, -ˌlē noun plural
Usage: usually capitalized
Etymology: Medieval Latin, from Late Greek Akephaloi, plural of Akephalos, from Greek akephalos headless — more at acephalous
: various groups of 5th century and 6th century Christians that recognized no patriarch ; especially : Egyptian Monophysites after about A.D. 482