anabaena

noun
an·a·bae·na | \ ˌan-ə-ˈbē-nə \

Medical Definition of anabaena 

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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occurring twice a year or every two years

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