An order of minute entomostracous fresh-water and marine Crustacea: so named because their five pairs of feet are mostly used for Swimming.
the GNU version of the Collaborative International Dictionary of English
noun plural.
An order of Entomostraca, including many minute Crustacea, both fresh-water and marine.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
minute planktonic or parasitic crustaceans
Word Usage
"For information about the pelagic species Scomber japonicus and its predator/prey interactions with other stocks and with zooplankton (copepoda and mysidacea), see Gonzalez and Bas (1989)."