[swim.mer.et] n (1840): one of a series of small unspecialized appendages under the abdomen of many crustaceans that are best developed in some decapods (as a lobster) and usu. function in locomotion or reproduction
SWIMMERET
Meaning of SWIMMERET in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012