any of various structures or regions at the caudal end of the body in certain invertebrates.
- py·gid·i·al, adjective
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How to use pygidium in a sentence
All indications are that the spine was not in any sense a pygidium.
It and the pygidium are due solely to functional requirements.
pygidium and part of the thorax, with some of the appendages.
Appendages of the thorax and pygidium, seen from the dorsal side.
This same type of broad-bladed exopodite is also found on the thorax and pygidium.
British Dictionary definitions for pygidium
the terminal segment, division, or other structure in certain annelids, arthropods, and other invertebrates
- pygidial, adjective
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