| 单词 | spear-fern |
| 释义 | > as lemmasspear-fern spear-fern n. ΚΠ 1867 W. W. Smyth Treat. Coal & Coal-mining 37 The Odontopteris, or tooth-fern, and Lonchopteris, or spear-fern, are [fossil] genera which occur less frequently. < as lemmas |
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