American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
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Elsewhere on the web
The tanks simply use a mix of charcoal, sand, rocks and gravel and this is enough to get 99\% of contaminants out, including giardia and cryptosporidium.— TreeHugger
I had contracted giardia, an intestinal parasite -- probably from the wine.— rediff.com
Take risks and you can end up with unwelcome surprises like giardia -- or worse.— rediff.com
Potters for Peace (PFP) in Nicaragua developed the "ready-to-use" ceramic filter, which eliminates almost 100\% of all bacteria, including E. coli and Vibrio cholera, as well as giardia and Cryptosporidium.— Yemen RSS News Feed - Yemen Times
The EX filter will strip out anything larger than .2 microns, which accounts for most bugs like crypto and giardia, as well as particulates (sand, rocks, etc …)— Kit Up

American Heritage Dictionary (1)
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