ACEPHALOUS
acephalous
(adjective) lacking a head or a clearly defined head; “acephalous worms”
Source: WordNet® 3.1
Etymology
Adjective
acephalous (comparative more acephalous, superlative most acephalous)
Headless
(zoology, applied to bivalve mollusks) Without a distinct head.
(botany) Having the style spring from the base, instead of from the apex, as is the case in certain ovaries
Without a leader or chief.
Without a beginning
(prosody) Deficient in the beginning, as a line of poetry that is missing its expected opening syllable
Source: Wiktionary
A*ceph"a*lous, a. Etym: [See Acephal.]
1. Headless.
2. (Zoöl.)
Definition: Without a distinct head; -- a term applied to bivalve mollusks.
3. (Bot.)
Definition: Having the style spring from the base, instead of from the
apex, as is the case in certain ovaries.
4. Without a leader or chief.
5. Wanting the beginning.
A false or acephalous structure of sentence. De Quincey.
6. (Pros.)
Definition: Deficient and the beginning, as a line of poetry. Brande.
Source: Webster’s Unabridged Dictionary 1913 Edition