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pulvinaria

noun
pul·​vi·​nar·​ia | \ ˌpəlvəˈna(a)rēə\

Definition of pulvinaria

1 capitalized : a genus of scales in which the females are large, flat, and nearly circular and secrete a cottony egg case — see cottony maple scale
2 plural -s : any insect of the genus Pulvinaria

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History and Etymology for pulvinaria

New Latin, from Latin pulvinus cushion + New Latin -aria; from the appearance of the egg case

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