单词	pteridophyte
释义	pteridophyte /ˈtɛrɪdə(ʊ)fʌɪt / noun Botany A flowerless green plant of the division Pteridophyte, which comprises the ferns and their relatives.H. Potonié first hypothesized the existence of a group of such transitional plants between pteridophytes and seed plants in 1899, but it is now known that ferns themselves are not the direct ancestors of seed plants.... The term ‘xerophytic fern’ is somewhat of an oxymoron as most pteridophytes inhabit moist environments.
随便看	hydrodynamical hydrodynamicist hydrodynamics hydroelectric hydroelectricity hydroengineering hydrofluoric acid hydrofluorocarbon hydrofoil hydrofracturing hydrogel hydrogen hydrogenase hydrogenate hydrogenation hydrogen bomb hydrogen bond hydrogen cyanide hydrogenous hydrogen peroxide hydrogen sulfate hydrogen sulfide hydrogen sulphate hydrogen sulphide hydrogeological

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