diatom

Từ điển Oxford Learners Wordfinder Dictionary

noun

microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica (Freq. 1)
• Hypernyms:
alga, algae, phytoplankton
• Member Holonyms:
Bacillariophyceae, class Bacillariophyceae, Diatomophyceae, class Diatomophyceae