< /ˌeɪ səˈfæl ɪk/. Zoology. headless; lacking a distinct head.
- having no head or one that is reduced and indistinct, as certain insect larvae
- having or recognizing no ruler or leader
“headless,” 1731, from French acéphale + -ous, or directly from Late Latin acephalus, from Greek akephalos, from a- “not” + kephale “head” (see cephalo-).