noun ge·lid·i·um \jəˈlidēəm\

Definition of gelidium

  1. 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. 2 plural -s :  any alga of the genus Gelidium

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Origin and Etymology of gelidium

New Latin, from Latin gelidus (influenced in meaning by Latin gelare to freeze, congeal) + New Latin -ium; from the fact that the plants are boiled down to make a jelly

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to criticize severely

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