[ ey-sef-uh-luh s ]
/ eɪˈsɛf ə ləs /


Also a·ce·phal·ic [ey-suh-fal-ik] /ˌeɪ səˈfæl ɪk/. Zoology. headless; lacking a distinct head.
without a leader or ruler.

Origin of acephalous

1725–35; < Greek aképhalos; see a-6, -cephalous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for acephalous

British Dictionary definitions for acephalous


/ (əˈsɛfələs) /


having no head or one that is reduced and indistinct, as certain insect larvae
having or recognizing no ruler or leader

Word Origin for acephalous

C18: via Medieval Latin from Greek akephalos. See a- 1, -cephalic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for acephalous



"headless," 1731, from French acéphale + -ous, or directly from Late Latin acephalus, from Greek akephalos, from a- "not" + kephale "head" (see cephalo-).

Online Etymology Dictionary, © 2010 Douglas Harper