gelidium
noun
ge·lid·i·um
| \ jəˈlidēəm\
Definition of gelidium
1
capitalized
: a genus of red algae (family Gelidiaceae) having cartilaginous terete or compressed much-branched fronds and cystocarps immersed in swollen branchlets and being important sources of agar — see gelidiales
2
plural -s
: any alga of the genus Gelidium
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