heterocyst
noun
het·ero·cyst ˈhe-tə-rō-ˌsist 
: a large transparent thick-walled cell that is found in the filaments of some cyanobacteria and is the site of nitrogen fixation
heterocystous
ˌhe-tə-rō-ˈsi-stəs
adjective 
Word History
First Known Use
1872, in the meaning defined above
- paper nautilus
- paper office
- paper over
- paper over the cracks
- paper patent
- paper plant
- paper profit
- paper pulp
- paper pusher
- paper qualification
- paper rate
- paper red A
- paper reed
- paper release lever
- paper round
- paper route
- paper rush
- paper sailor
- paper shale
- paper standard
- paper stock
- paper table
- paper tiger
- paper towel
- paper trail