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glabella
glabrate
glabrescent
glabrous
glacé
Glace Bay
glacial
glacial acetic acid
glacial period
glaciate
glacier
Glacier Bay
Glacier Bay National Park and Preserve
glacier cream
glacier meal
glacier milk
Glacier National Park
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glacial period
gla·cial pe·ri·od (plural gla·cial pe·ri·ods)


noun 
Definition:
 
ice age: any period of geologic time when most of the Earth was covered in ice
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