clitella

clitellum

[klahy-tel-uhm]
noun, plural clitella [klahy-tel-uh] .
a ring or saddle-shaped region of glandular tissue in the body wall of certain annelids, as earthworms and some leeches, that after copulation secretes a cocoon in which the eggs and sperm are deposited for fertilization and development.

Origin:
1830–40; < Neo-Latin, neuter noun based on Latin clītellae packsaddle

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World English Dictionary
clitellum (klɪˈtɛləm)
 
n , pl -la
a thickened saddle-like region of epidermis in earthworms and leeches whose secretions bind copulating worms together and later form a cocoon around the eggs
 
[C19: from New Latin, from Latin clītellae (plural) packsaddle]

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Etymonline
Word Origin & History

clitellum
"raised band around an earthworm," 1839, from Mod.L., from L. clitellae "a pack-saddle."
Online Etymology Dictionary, © 2010 Douglas Harper
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