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zoology a gland in certain invertebrates that secretes the components required for forming the shell of an egg
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Words nearby shell gland
shellfire, shellfish, shellfishery, shellflower, shell game, shell gland, shell jacket, shell-like, shell out, shell pink, shell program
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use shell gland in a sentence
In A the shell-gland and the mouth and the rudiment of the enteron are shown; primitive mesoderm cells.
The shell-gland is destined in Limnaeus to become very rapidly stretched out, and to disappear.
The shell-gland arises as an epiblastic thickening on the posterior and dorsal side.
In the centre is the mantle with the shell-gland which is now very considerably raised beyond the general surface.
Its cells first become differentiated into mesoblast and hypoblast after the shell-gland has become a fairly deep pit.