the GNU version of the Collaborative International Dictionary of English
n. one of the aplacophora; a deep-water wormlike mollusk lacking calcareous plates on the body but having fine limy spicules on the covering mantle.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. deep-water wormlike mollusks lacking calcareous plates on the body but having fine slimy spicules on the covering mantle
Word Usage
"Some authors propose the clade to represent the most basal branch within Mollusca, while others claim aplacophoran mollusks (Solenogastres and Caudofoveata) to be derived."