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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… 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… Polymers , A polymer is a very large molecule in which one or two small units is repeated over and over again. The small repeating units are known as monomers.… Hepatomegaly , hepatomegaly Enlargement of the liver as a result of congestion (e.g. in heart failure), inflammation or fatty infiltration (as in kwashiorkor).
hepa… Psilophytales , Skip to main content
Psilophytales
Psilophytales (psilophytes) Primitive pteridophytes, which were the earliest vascular plants, from the Silurian an… 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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