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Psilophytales
Psilophytales (psilophytes) Primitive pteridophytes, which were the earliest vascular plants, from the Silurian an… Alum , alum (ăl´əm), any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, ce… Ornithopoda , Ornithopoda (subclass Archosauria, order Ornithischia) A suborder of dinosaurs which had an essentially bipedal gait. The suborder includes several f… Hepatomegaly , hepatomegaly Enlargement of the liver as a result of congestion (e.g. in heart failure), inflammation or fatty infiltration (as in kwashiorkor).
hepa… Hygroscopic Nucleus , hygroscopic nucleus Microscopic particle (e.g. of sulphur dioxide, salt, dust, or smoke) in the free air, on which water vapour may condense to form… Silicate , silicate
silicates The most important and abundant group of rock-forming minerals, which can be classified according to the structural arrangement of…
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