1. 透明な殻に包まれた丸い体を持つ微小な淡水性甲殻類の動物(minute freshwater crustacean having a round body enclosed in a transparent shell)
2. 大きな中央の眼と西洋梨形の体と泳ぐために使う長い触角を持つ微小自由遊泳性淡水性カイアシ類の動物(minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming)