- the abdomen of a crustacean.
Origin of pleon
1850–55; noun use of Greek pléōn, present participle of pleîn to swim, sail; see pleopod
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pleon
The abdomen or pleon carries the remaining six pairs, of which from three to five are called pleopods and the remainder uropods.
This tribe has the pleon dwindled into insignificance, whereas in the other two tribes it is powerfully developed.
Poson oun estin, ho alloioi, kai d theasmetha; pleon men kata to stoma, meion d' kata to Pg 252Greek text hpar te kai tas phlebas.
Telson, tel′son, n. the last somite of the pleon or abdomen of certain crustaceans and arachnidans.