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Upper , up·per1 / ˈəpər/ • adj. 1. situated above another part: his upper arm the upper atmosphere. ∎ higher in position or status: the upper end of the soci… Thecodontia , Thecodontia (thecodonts) ‘Tooth-in-socket’ reptiles, and the most primitive order of the Archosauria (‘ruling reptiles’), ranging from the Upper Perm… Upper Gi Series , An upper GI examination is a fluoroscopic examination (a type of x-ray imaging) of the upper gastrointestinal tract, including the pharynx (throat),… Upper Class , upper class Conventionally the upper class is often thought of as equivalent to the ‘aristocracy’: that is, the (often hereditary) noble class, compr… Coccolithophorids , coccolithophorids (phylum Prymnesiophyta) A group of unicellular, marine, planktonic algae which are, at least at some stage in their life cycle, cov… Eifelian , Eifelian (Couvinian)
1. An age in the Middle Devonian Epoch preceded by the Emsian, followed by the Givetian, and dated at 386.0–380.8Ma (Harland et…
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