saccoderm
adjective
sac·co·derm
\ˈsakōˌdərm\
Definition of saccoderm
: having a cell wall consisting of a single piece and lacking vertical pores in the wall —used of desmids of the family Mesotaeniaceae —distinguished from placoderm
From the M-W Editors
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Origin and Etymology of saccoderm
sacc- + Greek derma skin — more at derm-
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