单词	cephalon
释义	cephalon /ˈsɛfəlɒn / /ˈkɛfəlɒn/ noun Zoology (In some arthropods, especially trilobites) the region of the head, composed of fused segments.This problem is reflected in the ongoing uncertainty about the number of biramous appendages in the trilobite cephalon.... This specimen cannot be specifically identified because it lacks the cephalon and first thoracic segment. Members of the Agnostina have only two segments between the cephalon and pygidium, and never have cephalic sutures. Origin Late 19th century: from Greek kephalē 'head'.
随便看	occupy occupying power occur occurrence occurrence book occurrences book occurrent O.C.D. OCD ocean oceanarium oceanaut ocean basin ocean-blue ocean crust oceaned ocean engineering ocean-floor spreading oceanfront oceanful ocean god ocean-going ocean green ocean greyhound Oceania

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