frustule
silica-based, porous cell wall of diatoms, consisting of two interlocking valves and providing structure and protection for these microscopic algae
en-GB/fɹʌstjuːl/
en-US/ˈfɹʌst͡ʃul/
silica-based, porous cell wall of diatoms, consisting of two interlocking valves and providing structure and protection for these microscopic algae