pleion
noun
plei·on
\ˈplīˌän\
Definition of pleion
-s
: a region in meteorology of positive departure from the normal of an element (as pressure, temperature, rainfall)
pleionian
\(ˈ)plī¦ōnēən\ adjectiveExplore Merriam-Webster
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Origin and Etymology of pleion
New Latin, from Greek pleiōn more, greater
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