pleon

[plee-on]

noun

1. the abdomen of a crustacean.

Other Word Forms

• pleonal adjective
• pleonic adjective

Word History and Origins

Origin of pleon¹

1850–55; noun use of Greek pléōn, present participle of pleîn to swim, sail; pleopod

Example Sentences

Telson, tel′son, n. the last somite of the pleon or abdomen of certain crustaceans and arachnidans.

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In the former case the hind-body, consisting only of the abdomen, forms a pleon or tail-part devoid of feet, and the species so constructed are Gymnoplea, those of the naked or footless pleon.

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In the latter case the middle segment almost always carries with it to the hind-body a pair of rudimentary limbs, whence the term Podoplea, meaning species that have a pleon with feet.

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It may be objected that hereby the term pleon is used in two different senses, first applying to the abdomen alone and then to the abdomen plus the last thoracic segment.

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Nun huakinthe lalei ta sa grammata kai pleon aiai!

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