anabaena
noun
an·a·bae·na
ˌan-ə-ˈbē-nə
1
capitalized
: a genus of freshwater cyanobacteria (family Nostocaceae) having cells in beadlike filaments and often contaminating reservoirs
2
: a cyanobacterium of the genus Anabaena
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Merriam-Webster unabridged
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