Trilobites have a distinct headshield or cephalon and a distinct tailshield or pygidium, and in both these regions the original segmentation has been suppressed — more completely in the cephalon than in the pygidium — and [...]
Source: wiktionary
Tailshield
Synonyms for "tailshield"
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.