a division of Amphineura where human anatomy is naked or covered with thin spines or setaelig but is without shelly plates
- an order of Amphineura
- A division of Amphineura where the human anatomy is naked or covered with slim spines or setae, it is without shelly dishes.
(n. pl.) A division of Amphineura when the body is nude or covered with thin spines or setae, but is without shelly dishes.
The order Aplacophora is divided into two suborders.