acephalic

Adjective

Meaning

Without a head.
Synonyms: acephalous, headless
an acephalic statue

Without a leader.
Synonyms: acephalous, leaderless
an acephalic society

(prosody) Deficient in the beginning, as a line of poetry that is missing its expected opening syllable.
Synonym: acephalous

(of a manuscript) Lacking the first portion of the text.
Synonym: acephalous
Coordinate terms: acaudal, atelous

(medicine, of a headache, dated) Characterized by a migraine aura without pain.

Source: en.wiktionary.org