pygidium /pī-gidˈi-əm or pī-jidˈi-əm/ (zoology)

1. In insects, the tergum of the last abdominal somite
2. The tail-shield of a trilobite

pygidˈial adjective

• midrib
• midribs
• midriff
• midriffs
• mids
• mid-sea
• mid-season
• mid-seasons
• midsection
• midsections
• midship
• midshipman
• midshipmate
• midshipmates
• midshipmen
• midships
• midsize
• mid-sky
• 'midst
• midst
• midstream
• midstreams
• midsts
• midsummer
• Midsummer day