Pygidium

Sensory organ of a posterior tergite of fleas, which apparently detects air currents.

pygidium

In trilobites, the posterior division of the body, formed by fusion of the telson with one or more posterior pleurae.
Found on http://www.ucmp.berkeley.edu/glossary/glossary_7.html

Pygidium

Py·gid'i·um noun ; plural Pygidia . [ New Latin , from Greek ..., dim. of ... the rump.] (Zoology) The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite .
Found on http://www.encyclo.co.uk/webster/P/202

Pygidium

• (n.) The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.
Found on http://thinkexist.com/dictionary/meaning/pygidium/

pygidium

pygidium (s), pygidia (pl); pygidial The posterior part of the body in certain invertebrates, chiefly insects, crustaceans, and worms, when forming a distinct segment or division; the caudal or pygal segment.
Found on http://www.wordinfo.info/words/index/info/view_unit/1046/2

Pygidium

The pygidium (plural pygidia) is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites. It contains the anus and, in females, the ovipositor. It is composed of fused body segments, sometimes with a tail, and separated from thoracic segments by an articulation. ==Chelicerates== In ara...
Found on http://en.wikipedia.org/wiki/Pygidium

Pygidium

A caudal structure or the terminal body region of various invertebrates.
Found on http://www.geog.ubc.ca/biodiversity/efauna/InsectGlossary.html

pygidium

the posterior part of the body in certain invertebrates
Found on http://www.kerbtier.de/Pages/Glossar/enGlossar.html

pygidium

In trilobites, the posterior division of the body, formed by fusion of the telson with one or more posterior pleurae.
Found on http://www.ucmp.berkeley.edu/glossary/gloss7metazoa.html
No exact match found