- Headless. - Without a distinct head; -- a term applied to bivalve
mollusks. - Having the style spring from the base, instead of from
the apex, as is the case in certain ovaries. - Without a leader or chief. - Wanting the beginning. - Deficient and the beginning, as a line of poetry.
Meaning of 'acephalous' (Princeton's WordNet)
1 . acephalous
[ s]
Meaning (1): - lacking a head or a clearly defined head