A genus of large, circular diatoms (single-celled algae) with intricate geometric patterns on their shells, commonly found in marine environments.
From Greek 'koskinon' (sieve) and 'diskos' (disk), referring to the sieve-like perforated appearance of these diatoms' silica shells that resembles a disk with holes.
These microscopic organisms create some of the most beautiful geometric patterns in nature, and their intricate silica shells are so perfectly engineered that scientists study them to develop new filtering materials and nanotechnologies.
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