1. pleon - Noun
2. pleon - Verb
pleon (plural pleons)
(zoology) the abdomen of a crustacean
plēon
(with genitive) to endanger, risk
Internal anatomy Most of the musculature of a prawn is used for bending the pleon, and almost all the space in the pleon is filled by muscle. Source: Internet
By the second protozoea, segmentation appears on the pleon, and by the third protozoea, which may also be called the metazoea, the uropods have appeared. Source: Internet
The pleon (abdomen) is unsegmented in the first protozoea, and ends in a bilobed telson, which may be used for cleaning other appendages, or for steering. Source: Internet