Dictionary

heterocyst

noun het·ero·cyst \ˈhe-tə-rō-ˌsist\

Definition of HETEROCYST

:  a large transparent thick-walled cell that is found in the filaments of some cyanobacteria and is the site of nitrogen fixation
het·ero·cys·tous \ˌhe-tə-rō-ˈsis-təs\ adjective
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First Known Use of HETEROCYST

1872

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