APLACOPHORA is a 11 letter word that starts with A.
\Ap`la*coph"o*ra\, n. pl. [NL., fr. Gr. 'a priv. + ?
a flat cake + ? to bear.] (Zo["o]l.)
A division of Amphineura in which the body is naked or
covered with slender spines or set[ae], but is without shelly