| 单词 | pecopteris |
| 释义 | pecopteris (once / 407563 pages) n WORD FAMILY pecopteris n Carboniferous fossil fern characterized by a regular arrangement of the leaflets resembling a comb Hyper fern any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores |
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