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planetary gear
planetary nebula
planetesimal
planetoid
planetology
planetwide
plangent
plani-
planimeter
planish
planisphere
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plank spanker
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planimeter

pla·nim·e·ter [ plə nímmətər ] (plural pla·nim·e·ters)


noun 
Definition:
 
instrument measuring area of plane figure: a mechanical instrument that measures the area of a plane figure as a pointer is moved around the figure's edge

[Mid-19th century. < French planimètre< Latin planus "flat"]

pla·ni·met·ric [ plàynə méttrik ] adjective
pla·ni·met·ri·cal·ly adverb
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