单词	Orthoceras
释义	Orthoceras noun Or·​thoc·​er·​as ȯ(r)ˈthäsərəs : an ill-defined genus of extinct nautiloid cephalopod mollusks having a long tapering shell that is nearly or quite straight, almost smooth, and many-chambered Word History Etymology New Latin, from orth- + -ceras
随便看	isogonic line isogonics isogonies isogonism isogons isogony isograft isografted isografting isografts isogram isograms isograph isographs isogriv isogrivs isogynous isogyre isohaline isohalsine isohel isohels isohyet isohyetal isohyets

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