Iglu vs. Igloo: What's the Difference?

Iglu and Igloo Definitions
Iglu
Archaic form of igloo
Igloo
A house made of blocks of snow, such as those built by the Inuit.
Iglu
An Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome
Igloo
A dome-shaped structure or building.
Igloo
A dome-shaped Inuit shelter, constructed of blocks cut from snow.
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Igloo
(zoology) A cavity, or excavation, made in the snow by a seal, over its breathing hole in the sea ice.
Igloo
(military) A reinforced bunker for the storage of nuclear weapons.
Igloo
(logistics) A kind of airfreight cargo container.
Igloo
An Eskimo snow house.
Igloo
A cavity, or excavation, made in the snow by a seal, over its breathing hole in the ice.
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Igloo
An Eskimo hut; usually built of blocks (of sod or snow) in the shape of a dome