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The type of large, non-flat, see-through plastic lid used to cover Slurpees and various iced coffee drinks that allows for wide spill-over of whipped cream and other edible, non-liquid material.
"Wow, they're putting a lot of whipped cream on that iced mochachino...you're gonna need a biodome for that!"

"Oh no! My straw's too short for the biodome...I'm losin' it!"
biodome by Brett W. August 8, 2005
Related Words

Binometer 

Measures the maximum amount of time an individual can spend grooming and preening in a public restroom before arousing suspicion
Man, Dinino blew the top off the binometer! He must have spent 20 minutes feathering his hair in the restroom today.
Binometer by Furry Trout December 15, 2009
Bob and Jenny got married, had two kids, became Republicans, began attending Cavalry Baptist, and moved out of their city flat and into a Gold River McMansion, a new biodome out on Highway 50. They now drive SUVs through two hours of heavy traffic to get to their jobs. When asked why he had become such a cheesedick, Bob replied, "It was for the children."
biodome by Scott Mansfield January 11, 2008

bionomenphilia 

An abnormal condition involving an unatural desire to produce new nomenclature to describe biological concepts. This condition has recently began to be used in describing words in all areas of science, not just biology. The condition is caused by a researcher or american news anchors' desire to become famous for coining new terms.
He made up a dumb word demonstrating his blatent bionomenphilia.
bionomenphilia by Seany S February 11, 2008
biodome by Lon September 5, 2005
guy - hey look theres a biodome
dude - yeah that biodome goes both ways...
guy - thats weird.