“Helicoplacoidea”的概念、定义、翻译、参考文献-科学参考

单词	Helicoplacoidea
释义	Helicoplacoidea [´hel·ǝ·kō·plǝ`kȯid·ē·ǝ] ^PALEONTOLOGY A class of free-living, spindle- or pear- shaped, plated echinozoans known only from the Lower Cambrian of California.
随便看	circle of equal altitude circle of equal declination circle of equal probability circle of illumination circle of inertia circle of inversion circle of latitude circle of least confusion circle of longitude circle of perpetual apparition circle of perpetual occultation circle of position circle of probable error circle of right ascension circle of uncertainty circle of Willis circle shear circle sheet circling approach area circuit circuital field circuit analyzer circuit breaker circuit capacity circuit conditioning

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