acephalic

acephalous

[ey-sef-uh-luhs]
adjective
1.
Also, acephalic [ey-suh-fal-ik] . Zoology. headless; lacking a distinct head.
2.
without a leader or ruler.

Origin:
1725–35; < Greek aképhalos; see a-6, -cephalous

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acephalous (əˈsɛfələs)
 
adj
1.  having no head or one that is reduced and indistinct, as certain insect larvae
2.  having or recognizing no ruler or leader
 
[C18: via Medieval Latin from Greek akephalos. See a-1, -cephalic]

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Word Origin & History

acephalous
"headless," 1731, from Fr. acéphale, from L.L. acephalus, from Gk. akephalos, from a- "not" + kephale "head."
Online Etymology Dictionary, © 2010 Douglas Harper
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