poly·pla·coph·o·ra \ˌpälēˌplaˈkäfərə, -älə̇ˌp-\noun plural Usage: capitalized Etymology: New Latin, from poly- + plac- + -phora : an order of Amphineura comprising the chitons all of which have the foot occupying the whole ventral surface of the body and the shell composed of eight calcified dorsal plates • poly·pla·coph·o·ran\| ̷ ̷ ̷ ̷ˌ ̷ ̷| ̷ ̷fərən\adjective or noun • poly·plac·o·phore\ˌ ̷ ̷ ̷ ̷ˈplakəˌfō(ə)r\noun-s • poly·pla·coph·o·rous\| ̷ ̷ ̷ ̷|pla|käfərəs\adjective