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pedion

noun ped·i·on \ ˈpedēən , ˈpēd- \
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Definition of pedion

plural 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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