acephalous
/əˈsefələs/adjective
1
- no longer having a head失去头部的：
an acephalous skeleton.
无头骨架。
1.1
- Zoology not having a head【动】无头的。
1.2
- having no leader or chief无首领的：
an acephalous society.
群龙无首的社会。
2
- Prosody (typically of a hexameter beginning with a short syllable) lacking a syllable or syllables in the first foot【诗韵】（尤指以短音节开头的六韵步诗行）首音步少一个（或几个）音节的。
词源
mid 18th cent.: via medieval Latin from Greek akephalos 'headless' （from a- 'without' + kephalē 'head'） + -OUS.