Ordovices-kí
(Tùi Ordovices-kì choán--lâi)
Ordovices-kì, Hàn-bûn kóng Ò-tô-kí (奧陶紀), sī Kó͘-seng-tāi (Paleozoic) lāi-té thâu-chi̍t-ê tē-chit sî-tāi, sî-kan tùi 485.4 ± 1.9 Ma (pah-bān nî chêng) kàu 443.4 ± 1.5 Ma. I-ê āu chi̍t tāi sī Silures-kì (Silurian). "Ordovices-kì" chit-ê miâ sī tùi "Ordovices" (Cymru ê bîn-cho̍k miâ) só͘ hō.
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