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pedion
noun
ped·i·on
\ˈpedēən, ˈpēd-\
Definition of pedion
pedia
\-dēə\: a form of crystal having only a single face and belonging to the rare asymmetric class of the triclinic system
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Origin and Etymology of pedion
New Latin, from Greek, plain, flat surface, from pedon ground; akin to Latin oppido thoroughly, Old Norse fet step, Sanskrit pada step, track, Latin ped-, pes foot
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