clitellum

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clitellum
of an earthworm

cli·tel·lum

 (klī-tĕl′əm)
n. pl. cli·tel·la (-tĕl′ə)
A glandular swelling of the epidermis of certain annelid worms, such as earthworms, that secretes a viscous fluid to form a cocoon in which the eggs are deposited.

[New Latin clītellum, sing. of Latin clītellae, packsaddle; see klei- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

clitellum

(klɪˈtɛləm)
n, pl -la (-lə)
(Zoology) 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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Test organisms: Cockroaches with weight range between 4-5g and adult earthworms having well developed clitella and weight range of 400-500mg were taken from University of Veterinary and Animals Sciences, Lahore, Pakistan.
Earthworms used in this study were adults with well-developed clitella. As earthworms are hermaphrodite, no sexual differences were taken into account.