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spirifer |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Spirifer \Spi"ri*fer\, n. [NL., fr L. spira a coil + ferreto bear.] (Paleon.) Any one of numerous species of fossil brachipods of the genus {Spirifer}, or {Delthyris}, and allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side
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