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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… Maxilla , max·il·la / makˈsilə/ • n. (pl. max·il·lae / makˈsilē; -ˈsilˌī/ ) Anat. & Zool. the jaw or jawbone, specifically the upper jaw in most vertebrates. I… Theropods , Theropoda (subclass Archosauria, order Saurischia) A suborder of dinosaurs which consists exclusively of bipedal, carnivorous forms. It includes the… 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… castellanus , castellanus From the Latin castellum, meaning ‘castle’, the name of a cloud species commonly associated with the upper parts of altocumulus, stratocu…
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