Definition of pygidium in English:

pygidium

Line breaks: py|gid¦ium
Pronunciation: /pʌɪˈdʒɪdɪəm
 
, pʌɪˈgɪdɪəm/

noun (plural pygidia /pʌɪˈdʒɪdɪə, pʌɪˈgɪdɪə/)

Zoology
The terminal part or hind segment of the body in certain invertebrates.
More example sentences
  • The pygidium, like the cephalon, was a structure in which segments were fused together.
  • A pygidium with an attached thoracic segment represents a meraspid stage of the species.
  • By contrast, some representatives of the Olenelloidea have pygidia with multiple segments.

Origin

mid 19th century: modern Latin, from Greek pugē 'rump'.

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