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Use "umbilicated" in a sentence
"The species is widely umbilicated, and the peristome is usually dark-coloured."
"The mustard acts directly, but the "poison Ivy" acts indirectly; so also the virus of cow-pox poisons the whole system, but usually appears in but one spot unless the lymphatics of the whole arm are weak, and in that case crops of umbilicated pustules precisely like the original, may recur on all parts of the arm for several months."
"The pustules on the fetus were well umbilicated and typical, and could have been nothing but those of small-pox; besides, this disease was raging in the neighborhood at the time."